I don't recall that being the case for the base game

because.... umm ¿how do I answer this?

sorry, late response, but the basic answer is that it is mostly arbitrary. One could argue that there are frames to be gained or lost mashing start on file select but I don't think that really matters. The best reason I think though is just that starting on reset is what the base game does and there is no good reason to break tradition for this version of the game.