Why do you need to 'protect others' if their mask works inbound? You have no idea whether you are 'protecting others' or just creating plastic waste for no goo

Why do you need to 'protect others' if their mask works inbound? You have no idea whether you are 'protecting others' or just creating plastic waste for no good reason. Clearly masks are not trivial to validate given that there is no evidence they have any positive effect whatsoever in the real world. No deflection in rates can be seen from NPIs and the process leaks like crazy. It's entirely a backward belief. Believing you are 'protecting others', yet doing nothing to protect yourself against the almost certain risk that other people won't be 'protecting others'. None of it makes any sense in any logical analysis.