Well, I dunno. I think almost everyone can find an hour a day to exercise if they really want to. I'm taking care of my aging parents right now, so I get daily reminders of what happens when you don't stay fit. Once you reach middle-age, the tendency is to decompose unless you do something to counteract it. My folks never did, and now they're paying the price by spending their last years in ill health.
And you have to remember I don't swim or do any other aerobic exercise like you do, and I often listen to my field recordings while running, tuning in and out of them, so that's a little bit like grading on a treadmill . . .
And your comment is ironic, considering that you were one of the first high-mileage people I became aware of on this forum. I was amazed how you would casually report your 10-mile runs.