Earlier quoted context omitted.
It's a positive vision of where society can go rather than having to sacrifice and buckle down. Do people not remember riding bikes as kids? Riding a bike is _still_ fun. It never stopped being fun. Now you can do that and get to work.
Riding a bike is not fun if you're doing it to commute - having to do it in all weathers, in traffic that feels unsafe, even if you don't feel like it and got poor sleep etc. It's really fundamentally not the same.
In a town that is minimally designed to facilitate the movement of people instead of cars there are multiple modes of transportation available to commuters, including but not limited to public transit for those days when you don't feel like walking or riding a bike.