Has Linus or another early Git developer commented on this? If not, what matters is how people actually use Git today, to the extent that it should matter at all relative to other more significant things.
yes[1], but it doesn't really matter because even if the intention is not to be a "master/slave" reference, people will still say it is offensive. So therefore it makes sense that banning other terms like "master of science" or "master record" would also be consistent here.