There’s no ace in the hole to play late in the game. Teams will line up differently on kickoff depending on the situation. Of course, Ohio State was going to be prepared for a potential onside kick late in the game.
Again, this is me speculating, but based on how coaches watch film and game plan, the NU coaches spotted a vulnerable spot in Ohio State’s traditional kickoff return team. It was worth trying and Lightbourn failed to even put his foot on the ball. Coaches will prepare endlessly for moments like that, and a player can still fail in the moment.