I gave my FitBit to my husband one day - school administrator, large school, had supervision at different gates during the day + running all over putting out “fires.”
He figured he covered five miles/day and it turns out he did. As a school teacher, my mileage was about 3.5 each day.
Of course all that changed after retirement - but having dogs helps, they get me out walking morning and evening.
I’m sure there are lots of occupations where people are on their feet all day walking. Nurses come to mind quickly.
We no longer have a dog, but we talk a 40-45 minute walk every day. Before we started walking every day, I only averaged a mile walking daily. Now I’ve averaged over 3.7 miles a day for 4 years. Our health numbers have improved, so until we can’t, I think we’re hooked on taking a nice walk every day, in addition to whatever exercise we get otherwise.