I understand your broad point that you want the testing regime to be robust and accurate, but if you know a little about Muse, he does SIP 24/7/365.
The interactions you describe are highly unlikely to transmit CoV-2.
FWIW, I'm not aware that CDC recommendations on testing have changed much over time:
Symptoms, testing, what to do if sick, daily activities, and more.
www.cdc.gov
I'm not saying your points are incorrect; just that I don't see a need to encourage Muse to go get tested for Covid-19.