No because you only have to take the car once a week, and you have to walk 3 times per week. If you want to force physical exercise by inefficiency like that, what exactly are the machines that should be forbidden and which should be allowed? You can do a million things from scratch which gives you physical exercise, we all rely on using machines that saves us from this poor life, why put the walking/cycling on a pedestal?

Just no. It is more efficient for me. Really don't care that you don't want to accept that. So take your efficiency argument and scrap it. You want cars and want everything to be optimized for it. That is your actual point and we both know it.

Waling is free, you need the exercise anyway so time spent walking isn't wasted. Driving however is a waste of time.

No, I want as much free time and energy as possible, and don't want to waste my life carrying water in buckets when I can have a tap. Likewise I also don't want to waste any time carrying milk either