How does any of that not pertain to aliums?
I get it aliens are whitelist and you're supposed to read, but some people just like doing that and enjoy expanding things. Some people enjoy making human characters, and I know the meme from most whitelist owners is "humans bad rpers/bad characters/bad whatever" but I've hardly honestly seen that JUST FOR HUMANS. People would enjoy expanding the lore and vocabulary of humanity there isn't really anything that could be said against that IMO. At least not in the "cultural" gap you are arguing.
Perhaps expansions to all the species could come from it as well.