If he's ready he's ready, and right now I do not think he will be come September. But 8-10 games in, maybe. Goff wasn't ready, and he waited, but they also got rid of terrible OC/HC situation and brought in a QB guy to right that ship. I think we're starting with the right OC in Daboll. So after 8 games Allen may very well be ready to get his feet wet.
I don't care if it takes 16 games, or 1 game. When Allen is ready to play, play him.