This really cuts to the issue for me. As someone who is a player, not a DM, I have grown sick and tired of DMs who act like us players are serving them, like we are somehow enabling their own fantasy world, and we are beholden to their every wish. Yeah, that's pretty cool for the DM, I will admit. I have helped DMs past in creating worlds because it is fun. But that really hurts us players. We play the game to have fun. We play the game to try new things and play a fantasy character. Limiting our choices for the purpose of your own preconcieved notions is doing a disservice to us, and is even doing a disservice to you. Are you implying that your mind is SO limited and boxed in you can't fit within the confines of society some dragonpeople or demonpeople? Why do you insult your own creativity and vision in such a way?
And really, you just "don't like it"? How do you think WE feel about getting our creative jusices flowing on a character concept and you say "No, not in my world". Is our creative choices really so devalued in comparison to yours? Are we your pawns in your intellectual masturbation, or do we have the right to have fun?