I mean, I kind of agree with you. In most fantasy games, and by most I mean D&D, it doesn't really matter whether your character as a halfling, elf, half-elf, half-orc, or human. The game is going to play pretty much the same no matter what. In a lot of stories, like Star Trek, the species of a character like Spock, Worf, or Data are used to examine a particular type of story. But for RPGs these days, homogenizing the various PC species seems to be En Vogue. And I say En Vogue because "I'm never gonna get it."