Why would you not wear a mask during a global pandemic in such close proximity to others and such a poorly ventilated space as a bus or train? I can never under

Why would you not wear a mask during a global pandemic in such close proximity to others and such a poorly ventilated space as a bus or train? I can never understand why people treat mask wearing as such an unreasonable burden, and I've yet to hear someone explain their reluctance in terms that don't involve an almost depraved indifference toward exposing others to a potentially deadly pathogen.