Maybe this is just me, but combining exercise with commute has never been practical for me. I still cycle to work, but I don't do it for exercise, only because

Maybe this is just me, but combining exercise with commute has never been practical for me. I still cycle to work, but I don't do it for exercise, only because it happens to be the fastest method in my present circumstances. But still using it as an example, on my way to work I take the easiest, least hilly route to avoid any sweating as possible. On the way back, I take the most downhill route possible because I still want to wear the same pieces of clothing (say, a jacket) without having to wash it daily. In short, I don't go all out. Result - I don't lose weight at all nor has my physical fitness improved much. Versus if I engaged in "pointless supplementary exercise", I do go all out, and after 30 minutes I'm all drenched in sweat. My present circumstances don't allow it, but I imagine if I could drive the same distance to work, I would save about 30-60 minutes which I could in theory use to engage in an all-out workout.