Agreed. Any team that is currently looking for a QB wants one TODAY, not in a few weeks. They can work with Beau's agent if he's still playing, but the other QBs that aren't playing will be available to meet with and talk to other teams and sign immediately, and they will have a lower risk of injury.
What if Beau entered the portal but said he would stay with Penn State through the playoffs, and then tomorrow he gets a great offer from another school? Does he have to turn them down? Does he say wait until I play these next few games? Or does he walk out on his team after taking all those reps this week? None of those are good options. I think he made the right call.