I don't see why this bothers you so much. You're apparently fine with making your own stuff, and listed a couple examples that lean more toward your preference. Are you just mad that you're not in the majority on this? Again, I can relate.
No. I'm annoyed because basically everyone who ever speaks positively about D&D specifically, or TTRPGs in general, spouts off about how the thing that makes it special and different (and wonderful) is that you can do anything. The whole of human creative freedom is accessible to you.
And then they go and tread paths so well-worn, you can't see side to side anymore because a thousand previous settings have already trodden a ravine into it.
This bothers me a lot. Because it implies
some kind of contradiction, and neither of the paths forward are good ones. On the one hand, it could be that people are simply
mistaken and TTRPGs don't actually embrace the breadth of human creativity. On the other, it could be that there's a distressing quantity of disingenuous people who
claim to want to see creativity and novelty and the unique things that can only happen because there's a real person behind it, but
actually want to see pretty much exactly the same thing, every single time, forever.
It would be like 10% of all the people you meet telling you that the beauty of home cooking is that you can make whatever you want, and then the only things that anyone actually makes are cheeseburgers and fries. Not saying cheeseburgers and fries are bad, I love a good cheeseburger and it is quite possible to make them better or worse etc. But
something is off between those two things.