Being the future and starting day one are two entirely different things, with very different reasons. I don't get the feeling this staff sees this season as a "free pass". That's basically suggesting they're forfeiting a play/game/season here or there. I don't see that from this staff. They're going to put their best players in the best situations to win each and every drive in each and every game. At the moment, obviously just another guy's opinion, I believe Gebbia has a better, faster, grasp on the offense. Can run it smoother than any other QB we have*, including Martinez. Martinez will grasp it eventually, but that takes time. Gebbia will help us win games now. Martinez will help us win games in the future. Possibly the very near future. But we're talking first snap here.
*edit, suppose Vedral might have an equal or better grasp of the offense, so should have put any other eligible QB we have...