That's not so much a "sane defaults dotfile" as a highly-opinionated personal defaults dotfile. I don't consider that a bad thing, but do at least give it the deserved appellation.
Words can have different meanings in a jargon than they do in the dictionary, but that does not make those meanings invalid. For instance, in computing "sane" means "I'm an overly opinionated git and everyone who disagrees with me is wrong."