Learning the basics K - 8 is critical, but during a pandemic year why push it? Most of the urgency about opening up schools is so they can serve as a babysitter and parents can get back to work, it has nothing to do with learning at all.
As for high school, did you ever sit back and think about how much you remember from high school? And if you need high school for your SAT scores the diligent student can learn that stuff on their home computer with a small investment in a training program. Going to school to learn a subject is not nearly as critical as it used to be. Name a subject and I can send you 1000 youtube videos covering it.
At the end of the day I don't see how anyone can say with a straight face that outdoor sports are too dangerous but indoor classrooms are safe.
BTW sports teaches discipline, teamwork, leadership, self sacrifice, and physical conditioning.
There's something to be said for in person learning. My son is an honors student, but he says studying in his room is difficult due to all the potential distractions, XBOX and YouTube being a couple. But more importantly, he needs the socialization that school offers. He was just starting to come into his own last year right before the virus hit. Being home really stunted his social growth and he's now battling depression.
If the schools implement it correctly, the kids should be distanced and in masks. If so, I would suggest that is better than kids without masks in a football pile.
In high school, sports do not necessarily teach those things other than maybe conditioning. Plenty of kids in my school played because they were good at a specific sport and did not put any of the effort required to attain those other skills. If you were on varsity, It got you out of gym class back then, so there was that.
I work from home, pandemic or not, and my son will be a junior, so no sitter needed here. I want him to go back mostly for his own sanity and personal development. But the school needs to do it right. Maybe he alternates weeks of being home vs in school, so there's 1/2 the kids in the school at any given time.