It's not at all stupid to avoid the danger of the vaccine if you've already recovered from the real disease. According to the best current research, it's smart to avoid the vaccine if you're recovered. Especially to young people, the risk of adverse reactions is higher for recovered people, and no risk at all is warranted since the immunity, including to variants, is as good or better, and lasts as long or longer, according to current evidence.
Ad26/Ad5 vaccines like J&J and Oxford can develop immunity to the carrier adenovirus, breaking future vaccines based on the same platform so they won't work on you. Probably you can only get a few vaccines of this kind before that adenovirus is just burned for you. mRNA vaccines can develop an allergy to the PEG carrier, a problem that stopped use of the mRNA platform for chronic genetic problems and forced its use for rare shots like vaccines. The "ten years of research" into mRNA that is often mentioned was not vaccine research, but research for highly-profitable drugs you have to take every day or every week for the rest of your life, and that didn't work out because of PEG allergy so there is also a problem with taking endless mRNA boosters. If you're worried about "variants," and you've already recovered from the coronavirus, you shouldn't get a vaccine because it will put you in a worse position for boosters later. That's a second reason it's smart for recovered people to skip the vaccine.
Yet it's more difficult to prove you're recovered than to prove a government nurse stuck a needle in your arm on such-and-such date. Many people are not in the position to do it through no fault of their own because they were infected in the first wave when FDA was blocking the availability of tests. Others might have been able to prove it with an antibody test, but didn't bother until their titer faded, and ordinary folks outside studies can't afford the fancier reactivity tests. Even people who are in a position to prove it are not given the opportunity. "Private companies" don't care. Get the vax, peasant.
That's just one example of why we should not allow coercive policies that interfere with a person's private medical care. These issues are complicated, and high stakes. Neither the venue operator nor the chattering commentariat has the proper incentive to let you make a properly thoughtful decision about your health.
Besides that, there are people in specific unusual situations they cannot and should not have to explain or justify to you. And there are people who just came to a different conclusion.
If this had the IFR of ebola, and the vaccine we had barely worked well enough to manage it, the situation would be different. But with the stats where they are this is just wrong, very wrong.
Our public health officials really let us down by granting EUA then allowing these authoritarian, dismissive, ignorant coercive systems to flourish, undermining the limitations of the EUA. They may feel they've shirked responsibility, but I think history will tell a different story about them. I think they will be scorned in med schools for decades for this negligence.