You're prone to exaggeration (or, lies as
@Steeltime directly states). Ain't a person here believes you walked between 5-6 miles a day, especially given your level of obesity.
The average person "walks" a mile in 15-22 minutes.
40 miles in a week (if you count all 7 days) is 5.71 miles/day
That means daily you spent between 1 hr 26 mins to 2 hours 6 mins walking.
The only person buying that you spent 96 to 126 mins a day walking (weather be damned) is you.
Negative. It is different.
The commuter gets up, showers, walks to the car, drives the car, parks the car (often in a garage, or in a parking lot), walks from the car to the building/elevator, etc.
While in the office, said person has a longer walk to the restroom than at home...to the coffee/water than at home.
For lunch, the commuter will often go out to eat.
If not, the walk from their desk to the refregerator/break room for lunch is longer than the walk from the home office to the kitchen.
Working in an office is often social and one will walk to their manager's office, or to conference rooms to meet, or down the hall to shoot the **** with a coworker.
People in office buildings move.
I'm scientifically guestimating here, but I would believe the person sitting behind the desk in an office will get at a bare minimum 3K more steps than JellyrollFlogg sitting at home.
I sit behind a desk when working from home. I'll often have about 1,500 steps logged by 6-7PM when I go to work out (and get those steps in).
We are on a return to work and 3 days a week I go to a corporate office. At 6-7PM I'm always over 4K steps if not more.
When I travel (air travel), I'll get 8K to 10K steps easy walking from parking garages, through airports, to baggage claim, getting to rental cars, etc.
Working from home offers far less opportunity for movement (unless you make it happen) than working in an actual office somewhere.