" However I think I don't need to take any more Covid-19 vaccines." really ? let me know in a year or two how you got on.
I will try all fairly safe measures to protect myself and my wife from infection of any sort, ignoring just SOME benefit because unqualified people "question the Science" is plain silly.
My wife and I are elderly, and because of ongoing health problems are in real danger if we got even "just" the annual 'flu, we would be among the small number who DO die from it. I appreciate people who, here in the U.K, still care enough for others to wear a mask, we are not commanded to do so, or even advised much, it is voluntary, and caring.