AAQ – i think he means specifically. You have done impressive research on the various scenarios, but with halachos (and more) we bring our specifics to a rav. When we don’t, it means we chose to apply our situation to our research, and that is not foolproof. We do not always know if there are nuances or outside influences that apply, and we are very much nogea bdavar.
I will often look up basic questions in the shabbos, kashrus and muktza books I have, but I can’t do that with shailos.
Additionally, he did say he is maskless per a rav. Although i challenged it including anti mask behavior, there is no shortage of responsible qualified rabbaim AAND doctors telling people they do not have to wear them.