If your parish is like mine, chances are the people who were most likely frequent mass attendees pre-pandemic were elderly.
The same demographic most vulnerable to the virus. They’re just exercising caution especially if the mass obligation has been lifted.
Being asthmatic, I am vulnerable to the virus so I don’t attend mass.
I have to think people are just erring on the side of caution. Sitting in a closed space for one hour, six feet from the other people around you, wearing an N95 mask, is still a lot of risk. 5 percent of air and particles getting through is still a lot of air and particles.
I have not been to Mass since the pandemic began, and I have no intention of doing so, until either the pandemic is declared over, a vaccine is developed (which I shall take), or both. I have some health issues, fairly common for people of my age, that make me somewhat high-risk. More importantly, my parents, for whom I provide in-home care, are seriously disabled, and my father is gravely ill on top of that. I am robust and take good care of myself — I could probably get the virus and survive it, but they probably could not, and at any rate, the virus is the last thing they need. I do not go inside places I do not absolutely have to go, and even then, I am just “right in and right out”, no lingering. I do not eat in sit-down restaurants and I only go to absolutely necessary medical appointments (dental care is not “absolutely necessary”). If, in spite of my best efforts, I would get the virus, we have a second home nearby to which I can retire and quarantine — might be “shutting the stable door after the horses have gotten out”, but better than
not quarantining — I can homeschool my son via online instruction (Skype, Google Classroom, etc.), and I will have food and necessities delivered to my parents and son. I livestream the Traditional Latin Mass and I continue my modest donations to my parish via online giving.