I'm vaccinated and all.

However, it's impossible to prove that Covid is more harmful than the vaccine in every particular cohort of a population.

Anti vaxxers perceive themselves to belong to a cohort that are less likely to be harmed by the illness, because of youth, behaviour, or physical fitness or luck or religion or whatever.

On the other hand, they have plenty of evidence that people belonging to the same cohort have been adversely affected by the vaccine, therefore it's entirely logical from their point of view to not get vaccinated.