ME1's plot actually didn't make much sense. People just ignore that because it was a good game and fun ride.
Saren loses his Spectre status attacking Eden Prime to gain access to a Prothean beacon he already possessed (Virmire), to find a Conduit he didn't need, to gain access to the Presidium he and his indoctrinated Asari commandos already had full access to.
In retrospect that has always made me wonder whether Saren originally wasn't a Spectre in early drafts of the script. Remove Saren's Spectre status before ME1 (or have him never be a Spectre) and his searching for the Conduit now makes sense.
I don't think this is the case. I seriously doubt the Space police would let Saren and his private army walk through to the citadel, up to the presidium. And even if they did, they can't handle the entirety of the Citadel's forces.
I recall Wrex and Ashley saying how well throughout the citadel tower was to defend itself from possible invasions.
Now this shouldn't work against armies and armies of Geth, krogan and a spectre. However a small group force? No way.
No, not Tali. The possessor of the irrefutable evidence must live otherwise the galaxy was doomed. Saren would have been successful, and the reapers would have won.
I still don't understand why people make a discussion over this. Its presented as an axiom that Geth hardware outputs cannot be replicated.
Its not like someone got Space Fruity Loops and made-up a conversation.