Yochaigal makes an excellent point about the default of whiteness. This has been discussed by professional scholars of race and its social construction for some decades now: whiteness has typically meant blankness, being unmarked. Characteristics considered non-white are marked and therefore must be stated in narration, but the assumption is that without a description a white person is described.
It’s complicated also by the common currency of the eurofantasy, which is older than role-playing games and is perfectly explicable by its historical origin. As society has changed, however, the fantasies have remained as generic tropes, common currency, and are hard to extricate from the eurofantasy. Awkwardly, it is also increasingly a social risk for people racialized as white to play non-whites; predatory shaming (yochaigal’s “cancelled” effect) over perceived appropriations will only cement the eurofantasy in its place and constrain fantasy of all kinds to non-variety. But that’s the world in which we live.
I am guessing that spittingimage probably didn’t mean that politics should not appear in games, but that the vitriol and aggressive name-calling between gamers bring the games themselves down. I agree. If you want to ruin your day, do a google search with the terms osr alt-right. Then read the first eight or so hits. You may just want to quit gaming. Or, better yet: vote whenever you get the chance.