[namkt]

The government publishes infection rates at the county level. The county's health department may also have guidelines that differ slightly from the general nation-wide ones. If there is an uptick of infections in the local community and the boosters are recommended there (though still not necessarily at the macroscopic level), then that seems pretty clear to me.

But I still concur with OP. I am not an expert, and I don't know how to choose between experts with differing opinions. What I do know is that I trust certain institutions more than others.