Everyone has an opinion on if he should start or sit. Unfortunately, none of us know what's TRULY in his best interest and would aide his development the best.
For every case of "Yea well Rodgers sat and turned out well" I can throw a "Yea well Russell Wilson never sat".
What it simply comes down to in my opinion is...what way does Josh Allen learn the best? Is he the type of learner that can watch others, ask questions and absorb it all in? Is he the kind of,guy that has to feel the moment, get his hands in the dough so to speak and figure it out that way?
That said, my opinion is this. We are a run first team (no matter who is QB) that should have a solid defense. Whoever is the QB to start the season is going to be masked to some extent. If he is the kind of guy that can learn by doing, let him do it.