Most of the decisions made by the private bodies that you're naming, universities and sports leagues, are being made because those institutions are concerned with bad press and lawsuits - not necessarily in that order.

Doesn't mean they're the wrong decisions. But they're reflecting a lot broader calculus than vaccine efficacy and disease severity. Lawyers and accountants factor into them just as much as doctors.Even if I don't like the basis for the reasoning, it's one of the few material forces that's pushing us toward caution rather than just shouting "BUSINESS!" like our country usually does.