Being a mazik because of being uneducated is wrong. Being a moser is wrong. I was saddened to see how many shuls and other institutions flagrantly (or secretly) ignored all COVID restrictions, even at the beginning when people were literally dropping like flies, but it was even more saddening to see how many of these places were raided by the police because of a fellow yid who massered on them.
Ignorance leads a person to being a mazik. Back in the day, people refused to refrain from drinking before driving because “I can hold my liquor”. They were mazikim and caused untold amount of death and destruction to others. So too with people today who refuse to give their children proper healthcare and instead subject them and others around them to diseases like measles and whooping cough. The ignorant mazikim in question are those ignorant of how contagious diseases work and how dangerous COVID is, thus causing hezik to many around them.