Health

I thought your comment was fine, I kinda shared your opinion a bit for a while... lately walking has seemed "more useful than I thought" though. I guess you could also add cardio / strength with adding weight to carry (rucking) or going faster and up hills (military has "marches" carrying some weight over distances).

I think personally I'm sifting some extremes at the present of in the past having tried to do intense exercise and then be sedentary a lot of the day, to trying to walk more throughout the day currently but with less intense exercise (or also without being sedentary), and this will probably resolve to trying to do both the walking as a foundation as I think you correctly identified it as being, and then with some higher intensity stuff on top of it