N0, To your point, maybe mutations are the reason for recent second rounds of Covid? Possibly in some communities with low vaccinations and high number of kids in unprotected schools, virus is indeed endemic (circulating continuously) and hits again with mutations?
I also have to admit that I was wrong thinking that people who are immune to logical arguments will get it when it hits close (R Avigdor Miller explains that we are to learn a lesson from a disaster somewhere in Far East, if not, it will hit again closer at home, and the worst is getting “educated” by being hit yourself). But I digress from the anecdotal data point: several close families I know had Covid recently. In one, an only unvaxed person spent several weeks sufffering, the rest not a big problem. In another – (reluctantly) vaxxed adults did not even know they had it until the kid was sick and got tested. Now that adult who had no symptoms said “What did that vaccine do? I got it anyway”. I can only attribute this to a “long covid fog”.