What's strange about this? Depending on the start and destination, a car can either be faster or slower than other modes of transportation.

Sure, but when you're walking all the time, none of that time is wasted, because you're helping your body and brain function better. When you use a car, you really are wasting all your transportation time. To get the same benefits, you would have to drive places, and then go walking recreationally after, which would clearly take much more time to get the same utility.

Because literally every single study or individual realization is about the incredible effects of merely walking every day. And the Op stopped something which is universally deemed great both for the body and the mind and traded it for using a car and sticking themselves inside a gym instead. Surreal.