Agreed that they can be harmful in themselves, but it must be difficult to exclude the other factors in the lives of those who choose to wear face masks, or choose to continue activities where face masks are mandated. They are probably the same people who keep testing themselves for Covid and probably more importantly keep "vaccinating" themselves for Covid. People who avoid the masks probably avoid these dangerous activities too, even if it means staying at home for the duration of the Covid/vaccine hoax.