By this same logic Saquon Barkley, Chris Godwin, Micah Parsons, Parker Washington, Brenton Strange and host more all quit on their team. Not just for a bowl game but for an entire season or more.
There is no difference. None. If your saying everyone should honor their entire commitment to a university then your saying everyone should expire their entire eligibility, which basically NEVER happens with a top prospect type player.
Olu would have been a top 15 NFL pick last year, he came back, he owes Penn State nothing. Penn State owes him everything, model student and teammate. Some dude on his couch eating Cheetos watching a game ostracizing for not playing in a second rate bowl game. Hilarious.