The problem with what they're saying about wearing masks presumes that you're wearing a mask all the time, which is nonsense. Masks are not even close to being full proof so people are being exposed. Masks simply serve to slow the number of exposures. People are not traversing the world or even their homes in full body controlled PPE, so this nonsense that people are living so clean that their immune systems are radically diminished is just nonsense. The washing and mask wearing is just a measure to slow the spread of a couple of particular kinds of viruses.
It's this mindset that enables the idiots who want a medal for how "tough" they are so they head off to the office with their colds, with their fevers, with the flu and just make everybody else sick.