The real experts in the fields I know well don't tend to spend much time communicating with others about their expertise, especially to the layman. Why would the real experts in this particular field be any different?

Experts in any field are generally not the ones communicating with, and making recommendations to, the public.

The high level of insanity of public debate made people shut up. I know at least one immunologist who quit Twitter fairly early on in the pandemic because of it. Doing health communication has hazards of its own.