Wow, Mr. Elusive, you know how to dodge uncomfortable questions, don't you?
Let's break it down, shall we?
1) "The Catalyst makes a statement without providing any proof. Why should we believe it?"
Your answer:
Claiming it is a fallacy doesn't actually show were it is wrong. This seems to be a fancy way for people to actually avoid trying to disprove something by simply claiming it is a fallacy.
Where is the answer to my question? My question wasn't about Catalyst being right or wrong, it was about the lack of proof and therefore no reason to believe it.
2) "Explain me why would synthetics kill all organic life? Just because? Come on, you should be able to see this is insane. Even the Catalyst says "The created will always rebel against their creators". It says nothing about the destruction of all organic life, just created synthetics overthrowing their organic overlord".
Your answer:
If you don't know why synthetics would want to eliminate us then you really haven't been paying attention. Replay the game trilogy and watch for every time someone makes a stupid choice due to emotions or they simply don't want to have to deal with consequences of anything difficult. War, disease, death, destruction, hunger, filth, poverty, torture, crime, corruption and the ice capades. There are plenty of reasons if you actually pay attention to what happens in game.
What does it have to do with my question? Why should I bother replaying the trilogy? If you make a point, you need to provide me the proof, not the other way around. How "war, disease, death, destruction, hunger, filth, poverty, torture, crime, corruption" are the reasons to destroy organics? Non of this has anything to do with Mass Effect.
3) "But why would the Catalyst think that our technology would doom us all? There is no proof of that in the game. Geth are not a threat to all organic life (not without Reaper involvement at least). EDI is not a theat to all organic life (obviously) and that AI on the Citadel is defeated by Shepard (ONE PERSON!)."
Your answer (shortened):
Because the same technology that can help us can also hurt us. We create automated systems and computers to make work easier for us. But advanced enough could start to form their own independent thoughts and if they don't like up with us death can happen.
It can, yes, but not because the technology is bad but because humans (or organics) are flawed. In your examples technology is just a tool, the harm is coming from us using this technology with ill intent. As for AI... "Like"? Really? So you are saying that the reason behind the organic-synthetic conflict is dislike of each other? This is...like, child's logic. If you want to prove that synthetics would want to organize Armageddon in the galaxy then simple 'dislike' won't cut it. For a conflict to happen there needs to be a stronger reason.
Geth are absolutely a threat to organic life. With only a small fraction of the over all Geth population they were able to strike into the heart of Citadel Space. While they were fully aware the attack was coming BTW. And effectively wipe out the fleets in charge of protecting the Citadel. You can't even make the argument that Sovereign was there because it did nothing but barrel though a couple of cruisers. EDI is an individual AI but is also an individual AI able to control a heavy Frigate with stealth technology. She sure as heck is a threat to organic life. Gambling AI wasn't defeated by Shep in any normal sense. Pulling the equivalent of powering down a conduit charge to prevent the explosion from causing any damage isn't really defeating them as if the AI actually had a chance.
Oh boy. You misunderstood. You are talking about potential threat. But potential threat is everywhere in ME universe. I am talking about the intentional threat. Geth don't venture outside the Perseus Veil (your example is of Heretics) and are only a threat to invaders. EDI means no harm to organics, it is ready to burn its last circuits just to defeat the Reapers. Do you understand now?
4) "Why do you need their DNA when you can just upload ther minds to the Reaper platform?"
Your answer:
They melt the body down to use it to construct the Reapers. Why waste resources they would need to harvest from the planets to create the Reaper body when they can simply break down the harvesting bodies into their individual elements and then reform them in ways needed to create the Reaper body. Reapers are serious about recycling.
Okay. So it elemental transmutation then and is needed just as a building material. But what about the minds and personalities? Have they been uploaded or not?
5) "Why does the Catalyst control them instead of giving them free will?"
You avoided the question.
6) "And why use them as a weapon when they are not invincible?"
Invincibility is an illusion nothing is invincible. How ever the usual harvest pattern was interrupted during this cycle leading to a much more protracted war. As well as allowing the species of the galaxy to upgrade their arsenals to stand up more against them. Some losses are inevitable.
You didn't really provide an answer as to why put Reapers in harm's way. Losses are inevitable in wars. The Catalyst says however that Reapers are not in conflict with organics, they just fulfill their purpose. So why start the harvest so late and in so blunt manner when it puts the precious Reapers in danger? I mean, it made more sense in ME2 than in ME3. Collectors were harvesting humans for the Reapers and the Reapers themselves were safe in the Dark Space. Why not continue this silent harvest? There got to be other slave species that can be used for harvesting purposes.
7) "Why not make invincible Reapers? Or why not make purely synthetic Reaper soldiers for the Harvest and let the "civillian"(harvested) Reapers "live" in Dark Space where noone can harm them?"
Creating a massive army of fully synthetic creations would be an extremely resources heavy endeavor.
So, you want to tell me that those same ancient machines gods that constructed idestructible Mass Relays (only asteroids can break them) and the Citadel (which when closed is indestructible as well) don't have the resources to build the Reapers with the same properties? I don't buy it. And why can't they use the same organic material and transmute it into something as strong as the Mass Relays?
8) And why preserve species in Reaper form when you can simply destroy them to make room for younger species?
You avoided the question.
9) "What is the Catalyst's 'solution': To preserve organic LIFE in general OR preserve advanced SPECIES in Reaper form?"
Advanced life is organic life. It is entirely possible to wipe out all organic life in the galaxy. Everything from advanced species to simple bacteria has tolerances of what it can life in. A few asteroid strikes or orbital bombardment would render the planet incapable of supporting anything more advanced then bacteria. And even that could be killed off. Say a race of AI's attacked Earth and destroyed it's fleets in orbit. They wouldn't even need to land on the planet. Fireing at it from orbit would wipe out all life but leave it in a state they they would still be able to live/harvest resource from it.
So which is it? You avoided the question. What needs to be preserved here? Organic life in general as in plants, animals, bacteria etc or advanced species that are harvested to build a Reaper?
In total: you avoided 6 my points out of 9. This is a very one-sided discussion which is getting annoying.