For his own sake, I agree with you, he should sit out the season.
But I can totally see the other side of him wanting to get back ASAP. There is a lot of money to be made and he has to prove this season he can play well, or else he probably won’t last much longer in the NFL. He already has an extensive injury history, weak arm, etc. He’s seemingly found himself in an offensive system that works for him and I’m sure he realizes that. He knows if he plays well he can be rewarded with a lucrative contract (especially with all this guaranteed money being given out).
if I’m a betting man, I bet he’s out there in two weeks. Essentially his NFL career right now, at least as a starter, is on life support, and he needs to play to keep it going.
although, i hope, for his sake, he makes a mature, informed decision that it may be best to walk away from the game for the remainder of the season.
He’s stuck between a rock and a hard place right now.