Probably not. If you need to walk a mile, that’s a feature, not a bug. Of course, if you need to walk multiple miles, that’s a different story.
If the streets are very busy, the pollution bad, the tunnels smell like piss etc, then that is the problem.
Small amounts of moderate exercise every day are a lot better than going to the gym (by car, usually) for a hard workout.
I’d rather read a book on the sofa, but you can’t walk while sitting on the sofa.
But these are all things that can (and should) be fixed.