and, what do you want? a crystal ball?
she didn't take covid-501 at med school; she doesn't have a base of knowledge to draw on, and she's not even out there working in the field. she really is just reading the papers and following along, even if she has access to better data than you do.
if you really want an expert opinion, go to a field hospital, or interview somebody that is uploading papers to medrxiv. those are the people doing experimental work on the ground, that are really trying to figure this out and adjusting to things as they see it happen.
ms. tam is just a bureaucrat, and she doesn't have the answers you're expecting her to. nor is she ever going to get them...
the studies on mask use are clear enough: they don't work, except incidentally and as an absolute last line of defense. so, if you want to take every possible precaution because you're just like that then it makes sense to wear one. but, unless your mask use is accompanied by very specific behaviour, it will not substantively reduce your chances of infection - and if that very specific behaviour is adhered to, the extra protection provided by the mask is truly at best marginal.
the suggestion to utilize a filter is long overdue, but it's still hardly going to save you, if you're at risk. the bottom line is that humans need to exchange air particles with the atmosphere in order to undergo cellular respiration or they will overdose on carbon dioxide, and there's not a way to do that that eliminates the risk of viral transmission short of avoiding contact with other people altogether.
all solutions are false.