Bedrockgames
I post in the voice of Christopher Walken
You mean it's silly to consider looking someone in the eye and saying "No you can't play what you want and there's no way and no how I'm going to adapt my world to make us both have fun and have fun playing something that isn't your most inspired choice for X hours per week" different to not taking into account what people you have never met or heard of might want?
This isn't just about the player and the GM. Lots of players, myself included, do get annoyed when other players insist on a character concept that doesn't fit the genre or the GMs setting. Obviously there needs to be buy in with the group for the campaign to function. The more threads like this I read, the more I think that is a fundamental dividing line in the hobby more than anything else. Neither side is bad for wanting what they want. But some people do like the characters to be expected to fit the campaign concept, the world or the genre, others prefer for players to have greater say in what is a good fit.