Not everyone has access or shares the same situation. Just because you may do one thing does not nessesary mean everyone else can do the same. There may be reasons I can’t take a car. These can be personal preferences or physical barriers.
For example I could be blind, or maybe I suffer extreme hand eye coordination issues. It could be that I can’t afford a car, or the financial expense associated with it. Or maybe I don’t want to be apart of the environmental expenses owning a car.
And who knows maybe I cycle or take a scooter, but use transite as a connection to cut down travel time.