The issue with your premise is in defining "behaving in a reasonable fashion". This is incredibly subjective. It also speaks to the ignorance that privileged people have in regards to assuming everyone else must also have.
In many cases, "Just close shop for two weeks (or maybe a year? Who knows...), and also you have to wear a mask all the time now" is not a reasonable ask. People have mouths to feed and bills to pay. Telling them to just shut off their income is a non-starter. And no, a $1200 stimulus check doesn't cut it. Banks still want their money.
"Okay fine, but why isn't everyone just wearing a mask? It's simple! insert judgmental angry emoji here"
Well, a lot of places ran out of masks (and toilet paper for some reason...) early on (thank you sensationalism + news) making it impossible to get one. Someone tried refusing me access to a grocery store that I went to to buy a mask because, guess what, I didn't have a mask (after multiple repeated attempts to buy one in my area). Tell me how this is reasonable?
Since then, it's really been a crapshoot for what you think the rules are for wearing one in public. Where I am, if you are outside, you don't need one, and no one is expected to wear one, but you keep your distance physically. If you go inside, you wear a mask - unless you are sitting at a table, then you don't need one, sometimes...? Every news outlet/friend/family member you hear from on the matter has a different take on what is standard procedure now.
A lot of the "reasonable asks" of people surrounding COVID are not actually as reasonable as they sound in a one sentence, "You have to close shop and wear masks now!" mandate from a politician.
It's hard for me to believe that a "fuck it.." mentality wouldn't evolve around the issue.