The thinking error that you are making here is the assumption that people advocate for masking only to protect themselves
That's not why we do it
We do it because there is a current pandemic of a virus that causes brain damage, and a permanently damaged immune system, in over 80% of the people that catch a mild case
And because we want to protect people from that. In addition to protecting ourselves
It's wild to me, that altrustic motives for other people's behavior don't even occur to you