> but we generally don’t accept someone on a bicycle or someone skating
I see people on rented scooters/bikes on the sidewalk all the time. Society at large seems to absolutely accept this. (note that I'm commenting on the current state of affairs, not what I think ought be the case)
I said we, when I shouldn’t because I accept it. But I don’t think the majority of people what sidewalks to become bike lanes. That’s why there’s that distinction.