A very long history of voluntary mask-wearing especially during winter/influenza, SARS, bird flu hay fever etc season. No big deal —- you see it everywhere, especially packed trains So the transition here was seamless during C-19. It was not a new experience to freak people out, panic or anger them. Another thing is N-95s of others of high quality in wide use here, and hardly anyone wears them improperly (unless sauced salarymen at night coming home late). You’ll get your ass kicked if you sneeze on somebody lol
Not to mention that masks are fomites.