Mecheon
Sacabambaspis
Its fun. Or moreso, each race has its own reasons. Reasons you roll a tortle aren't going to be the same as rolling a tiefling or anything else. And ultimately? Folks like the character they've developed and they'll latch into that.Why do people chose these races?
Its a combination of playing to and mucking around with tropes. For example, a tortle. Aside from the obvious things you can go to (Teenage Mutant Ninja Turtles), what are turtles like? They're slow and they live really old. So if you just want your character's thing to be "They are slow and old", sure, you could do that with a human, but also being a turtle wizard? Who's studied things since before your race existed and you dang whippersnappers don't appreciate the old days, back when we just had one type of elf and we liked it!
(tortles having a short lifespan is actually the dumbest D&D racial age thing).
Sure you could play an old human wizard, but you could, y'know, also play an owl wizard. Or a lizard wizard.
Maybe you want to explore other ideas in your character that you just can't do as a human because, humans are humans. But what about warforged? How does a created being handle certain ideas? Or maybe, like me, you want to tear apart a certain trope that only applies to other races. I guess, yeah, you could do that as a human but.... Would completely lose the effect.
We're seeing the natural effect of human-centricism falling to the wayside alongside folks wanting to explore ideas with characters. We're all humans, and while I certainly have human characters (Like the Warchef), I also have character ideas that just.... Wouldn't work as humans so. They're other thingsI mean are humans even relevant in D&D anymore?