A new look at various clinical data found solid evidence: Studies have demonstrated that at least 20% of individuals infected with SARS-CoV-2 remain asymptomatic. This seems to be a big part of the problem with people who have become virulently anti-vaccine. A report published in Nature on July 19, 2023 provides significant evidence.
So, like it or not, the people ridiculing people wearing masks are convinced by their own individual experience.
Naturally, most of them are probably under age 60!