Your whole post, perfect!
But with this particular issue, I also want to point out that depending on the race, the player, and the group, going for truly non-human can be really, really creepy. Over on r/rpghorrorstories there's been a ton of posts over the years involving particularly obnoxious players with a furry fetish playing anthro races. I've even read a horror story or two about furry players who spent so much time talking about the position of the ears and how their tail was flicking that it caused tension, even without any creepy "I'm a cat, of course I'm going to lick my crotch in public" stuff.
Even in the actual D&D books, lizardfolk are written as emotionless cannibals and that's something that could break up a group if done by a player who takes things too far.
If you really go too far into xenofiction, even "normal" D&D races like elves and dwarfs can become people you probably don't want in your party. If your dwarf player decides that dwarfs value gold more than non-dwarfs, or your elf player decides that a thousand-year lifespan means never hurrying, no matter what (those short-lived humans were going to die anyway), then those are players who are likely not going to play well with the rest of the party.