o the rubber mask that they wear makes them unique? Because they look different they are different? I mean tabaxi have, like, almost nothing. They look like cats and come from someplace far away. Where? Who knows! What's their culture like? No clue, it's, ummm, really far away?
Well that's the point
Tabaxis are very different from humans but only official in one setting as a minor race.
Mechanically the race has a climb speed, faster speed, and natural weapons. So so a tabaxi community would be very different from humans before you layer culture. Same with a tabaxi PC with their increased speed, addition movement, and claws. Almost every scene a tabaxi player can display their tabaxiness before culture.
Same with dragonborn. Every single dragonorn player I've every seen goes into hostile environments with their breath weapon and resistance in mind. And they never turn down the request to short rest.
However because D&D is traditional and it's been decade since a setting with these fantastical races have been in mind as major aspects, the lore is weak. And having DMs who ban them doesn't create or reinforce their lore.
All I can say is we have different standards on what makes a race unique. If you can't acknowledge that elves and halflings (I didn't even get into the multiple crunch differences) are distinct I don't see any reason to continue.
Elves and halflings are distinct.
My point is the distinction is small and the races with high distinction rarely, if ever, get any real setting support..
There are no D&D official settings where dragoborn, goblins, orcs, tabaxi, minotaurs, etc are at the same level of importance or prominence as dwarves, elves, halflings, or gnomes. And none where they replace them.
And there are few DMs, like me, sharing and running homebrew setting and worlds where this happens.
I mean, this is a thread about DMs throwing a bone and allowing
one member of the race. Imagine one saying "replace dwarves with lizardfolk".