Are you sure you know how long a mile is?

At an average walking speed of 2.8mph, that's 4.6 hours of walking. The average American adult walks around 2.5 miles per day, mostly indoors trips between rooms. The American knowledge-worker or automobile-dependent suburbanite will tend to have a lower average.

Jogging / long-distance-running tends to be about twice that fast, or 2.3 hours of activity. Per day. Ten percent of their lives, running. Most people don't come anywhere close.

That's a half marathon every day. Not only is that far more time than most people could spend it's also far more activity than most people could do without injuring themselves. That kind of distance takes years to build up to safely.