Right, that's a valid point, that would have to be a consideration.
But there will definitely be some, who don't mind that (maybe even try to justify it by saying they'll work a job over the 2020-21 school year, instead), and who aren't planning on playing college, so this is their last year of football. And getting to be a senior/big man on campus, in-person. That can't be replaced by a virtual experience.
If I was supposed to be a senior, in the above situation, and someone said I could essentially just defer that to the 2021-22 school year .... I would absolutely consider it.