The reasons probably aren’t too different from why many of us who oppose mask mandates end up wearing masks. From Sam Younnokis at americanthinker.org:
Masks are useless as well as uncomfortable. I believe they actually increase the odds of the wearer coming down with a case of COVID infection. They make it hard to have intelligible conversations and hide what few smiles people may still be having. Yet I do mask.
Maybe I’m just a coward, afraid to stand against the overbearing government. As noble and even important as such a stand would be, I value more my ability to be self-reliant. In a modern world, in an urban environment such as the one in which I live, this is at best an illusion. I’m not growing my own food or hauling water and firewood. Maybe that’s practical and even essential if you have raw land that you’re homesteading. It’s pretty much impossible for most city-dwellers. There just isn’t enough land to support us, and there are many rules about what you can do with whatever space you have.
Don’t suggest everybody move to the countryside. That would just destroy the countryside.
I live in an apartment. I pay rent, buy food at stores, work in an office. My self-reliance consists of paying the bills myself and doing the chores myself. I know I’m no “mountain man.” The local health department has required stores to demand that customers wear masks while shopping. I don’t know how zealously the stores enforce the rules. Perhaps their business licenses depend on a high level of compliance. I wear the mask and try to limit myself to buying essentials only — no impulse purchases. It doesn’t fight the edicts, but it limits the time I spend in the mask.