> if some people care that much that it is called “main” and not “master”, and I don’t really care either way, why not let them have that one
Because (besides being an extremely stupid change for the most tenuous of reasons) this imposes a one-sided US-centric view of the world.
I do agree that getting that bent out of shape about the semantics of the names of inanimate objects like git branches is a bit weird, but then I am also talking from a position of privilege and have no lived experience of being treated differently because of my ancestry. The way I figure: if some people care that much that it is called “main” and not “master”, and I don’t really care either way, why not let them have that one?