Most people I’ve known who weren’t complete wingnuts and opposed to vaccinations out of craziness or political stupidity basically had this thought process that’s predicated on avoiding the immediate discomfort expected from the vaccine by rationalizing all the reasons they shouldn’t get vaccinated.
If I get the vaccine, I’ll feel bad for a day or two for sure. If I skip the vaccine, I will not feel bad for a couple of days, and there’s still a significant chance that I may not get [COVID, shingles, influenza, et al]. And if I do (in the case of COVID or influenza) catch them, I’ll probably only feel bad for a week at most.
Therefore, I’ll take my chances with possibly catching COVID/Flu/shingles, and not get vaccinated, because I know I’ll feel like crap now, and there’s a significant chance that I may not even get sick, and if I do, it won’t be that much worse than the vaccine.
It’s an extremely… wimpy and self-centered view of things, as well as ignorant, in that there are potential consequences to influenza and COVID that are far greater than merely feeling cruddy for a week or so, and there are external consequences such as less transmission that aren’t taken into account either.
Meanwhile, something like monoclonal antibodies are something they’re taking after they’re already sick and that purport to improve their health, so they’re all over that kind of thing.