... because they're not. Mostly.
The term "fetch quest" is kinda problematic in itself, because it's one of those phrases that means whatever you want it to mean, as long as it's derogatory: like "rollplaying" or "dumbed down". But for the purposes of this post, I'll assume that when people talk about a fetch quest, they mean a simple task, obtained from an NPC of no import, that involves no meaningful interaction with the game world. So you talk to a guy in town who asks you to find 10 bear pelts, which you obtain by killing bears one after another, and then you bring them back to him.
Now most CRPGs, including DAI, are power fantasies. You kill hordes of bad guys and accumulate huge wealth on the way to saving the world. However, the guy in town doesn't care about any of that. He just wants those bear pelts, and as far as he's concerned you're no different to anyone else he sees. This creates a disconnect between what the game sets you up to be, and how you're actually treated.
The nice thing is that DAI fetch quests, for the most part, do not fit this template. Rather than talking to someone to initiate them, they're acquired automatically by entering an area, or reading some lore, or finding an item on the ground. You never talk to anyone, and hence there is no dissonant moment when the high-and-mighty Inquisitor gets treated as a random nobody. There are exceptions, but they're few in number.
So, what are these quests then? I see them as basically act as a way to draw you into exploring the map: uncovering the blank areas, looking for ways to get to the next ridge, and so on. The standard quests like rifts, shards and astrariums are intended for this, but most of the other quests can be approached in the same way. They are also puzzles: how do you get to that annoying shard up on the hill, or find the landmark that doesn't show? Figuring out the paths to these quest objects was something that gave me a surprising amount of satisfaction; no doubt because I was focused on the process rather than the goal. If I'd taken a traditional OCD/completionist approach focused on efficiency and mechanically crossing off each quest in the journal, I'd probably have become frustrated and given up before long.
Of course, this introduces its own dissonance, in that the high-and-mighty Inquisitor is running off into the countryside for no good reason. But I can live with this; it's a decision I've made on my own rather than something the game world imposes on me. And hey, what's the point of having ultimate power if you can't indulge yourself?
I'm also excluding the more substantial quests from the above: things like the helping the refugees in the Emerald Graves, or the townsfolk in the Emprise, for example. I doubt those would fit any reasonable person's conception of a fetch quest.
In other words you are saying you are happy to decide shallow and unimportant things like "I decided to climb a hill to get a shard" and the complete inability to decide what to do when it comes to real matters. Like the most basic: I want to be the Inquisitior or I don't (then you could support someone to be, like Cassandra, Leliana or Cullen)
Choose your way to fight Corypheus. Choose to deal with Orlais or not. Same with the grey wardens. And the Venatori and stuff. Game offers you one way, and one approach, to the problems. Even the "choice" of mage and templars don't change anything because what you have to do is the same, get people to help you close the breach. Of course all of it have lore supporting need, but that's precisely the problem. You have one very defined way of dealing with the enemy, and among all the main quests you have one choice that makes absolutely no difference.
So you are left with the decision on what to do on the wartable and side quests aka unimportant and even more unimportant things. Easy way out Bioware? You don't want to report to a lot of different decisions so you let players choose shallow hollow stuff? A M A Z I N G. In short you shouldn't have written your post as something other than "I like them, it is my opinion", because that's it. You said yourself are able to enjoy the path to get a shard. Which previous Draon Age game featured mario jumping? None. So you just said you like something Dragon Age is not and never was. Just understand that this is exactly the problem.
You are still arguing like Inquisition was overall bad. No it isn't or is, doesn't matter, it absolutey doesn't matter. What everybody complains is that it was objectively mathematically dumbed down, you can count the number of features you had control over while building your character and tactics and compare, it IS A FACT, game is dumbed down. There is a higher absolute number of side quests, a lot higher, insanely higher. And people who love Origins loved the game as it was, did not want it too become better or different, so if you're into Mario Shard Hunting, go play Assassin's Creed or even Mario 64 if you must. Go collect the 120+ stars. Still a better RPG than Inquisition though.
Your hole post is explained by the "I enjoy making it to the shard" part. And of course you not realizing that for people who are not into action games the simples act of jumping is ridiculous, even more jumping to reach a place. You are talking as if Dragon Age was not a RPG franchise that never had action before. It doesn't matter if it is good or bad, if it is possible to enjoy or not, it is not Dragon Age, pure and simple. Is it that difficult into your mind to understand that I and a lot of other people couldn't care less if the game is good or awful as long as it keeps the Dragon AGe Origins features? And NEVER remove any of them? That's the most basic disagreement, and easy to understand for me, for the others it seems impossible, some people want a good game, some people want a great game, other people just want Origins.
"blla bla bla get over it" - If Bioware did not have this long story of keeping their legacy (that died with Inquisition) no one would expect it from them. Now it is pretty clear they will only go down so yeah, just like me a lot of people will never buy another Bioware game ever, we will play true RPGs like Divinity and Shadowrun, but is not unreasonable for people to expect a better version of Origins instead of a completely different game. And not only for their legacy but also for their videos saying it would be something between DAO and DA2, not something completely different from both.
Keep playing Plumbersition