For the most part, I've never had a need to restrict character species in D&D because I don't really view it as a meaningful choice. The campaign and/or scenario will play pretty much the same no matter what species the player character is. The ony exception I had was when running Curse of Strahd where I restricted species to what was found in the PHB.I find the problem is that an unfortunate number of DMs think "a dragonborn, like, at all" is something that must be "forced" into the setting, to say nothing of much more creative stuff.
You’re a dinner guest asking the host to make a special dish just for you.Or someone who isn't going to force their desires on everyone else because they feel the need to be 'compensated' for the privilege of creating an enjoyable experience for their friends can do it.
Just like how someone hosts a dinner party and doesn't put out a tip jar.
And players aren't oppressing DMs by not wanting to play under that DM's restrictions.DM’s aren’t oppressing you by running a campaign you don’t prefer.
And players aren't oppressing DMs by not wanting to play under that DM's restrictions.
Almost like everyone should work together instead of one person dictating above all of everyone else because they volunteered to do some work.