So “they protect other people, but they don’t protect me. Therefore, they are useless.” ? That’s... a statement.
I’m also not so sure you’re correct on your “healthy people never wear masks” tack either. In hayfever season, people wear them as a preventative measure. In the case of a few friends of mine, because they didn’t have time to do their makeup before work that morning. In other more polluted countries, perfectly healthy people wear masks to protect themselves from pollution.
And in my own case, when I was pregnant I tested negative for rubella antibodies, and my doctor told me to wear a mask every time I went to a shopping centre, places with people and when I went to work (in a school). Despite me being completely healthy. So 7 hours in a usually boiling hot classroom, teaching through a mask, heavily pregnant for the last two months of that. I can only put my lack of death from hypoxia or bacterial lung infections down to some kind of unrecognized superpower.