None of this is a real requirement. Elderly disabled people can use bikes as well. Same goes for people in very cold climates. Clothing helps against bad weathe

None of this is a real requirement. Elderly disabled people can use bikes as well. Same goes for people in very cold climates. Clothing helps against bad weather. Long commutes are possible, too (maybe using a Velomobile). And with cargo bikes (can also be shared) you can haul a lot.