I don't think this is true. Prior to COVID many societies wore masks when sick, and a lot of folks' eyes were opened to the usefulness of doing so during the pandemic. I plan on wearing my n95 out and about when under the weather now, even though I don't generally wear one now that vaccines are readily available.

And there are multitude of folks undergoing treatments that inhibit their immune system, where masking is especially important.

That said, people should stay away from cloth masks or surgical masks and use n95s/respirators.