I understand your point, but sports and activities are often tied to school, and those have been cancelled as well. I know for me, being isolated was very very difficult and the first time I was able to see friends it was like a cloud had lifted. I teach teens, and many times sports, band, choir, peer groups, etc., are their lifeline....even with kids who have a stable home environment. For kids who don't....not opening schools is very detrimental. I absolutely agree with you that there are no good answers, though. Opening schools isn't safe, not opening schools isn't safe in different ways.
Perhaps schools shouldn't be a source of so many resources (mental health, activities, sports, socialization, food), but unfortunately, they are. I guess we just need to ride this out the best we can, but remember to check in on everybody and help each other out.