Of course find what works for you, but 4300 miles even in your ideal setting ends up being discipline based over motivation. By that point you're running because you're supposed to run, not necessarily because you want to run. That's what I mean about lifting.

There's only so much novelty in a squat, so you have to find something beyond that. For me it was powerlifting, for others it's getting bigger, and others it's getting better in their sport.

Also, I deal with people and complex problems all day long. The gym is my retreat. I speak to no one and focus on the relatively simple task of picking up a weight.

Not sure I agree. At a point in my youth I ran 3000 miles in a year based on motivation (college competition, I was really motivated to keep the number one spot in the leaderboard).