The strongest example (I can think of) for your father's side would be fit soldiers, who turn to fat after their service is done. (because there is no external discipline enforced, anymore)
Not sure, how common that really is, though. Or maybe, that's just mostly headcases (PTSD and such).
I'd assume, that the military shapes the character in a long term positive way and that at least parts of the discipline become internalized and a part of an ex-soldiers character ('Once a marine, always a marine.'), though the military experience is a lot more than just discipline.
But then doing things consistently in a disciplined manner to a degree, which might only be possible to you with the help of Beeminder, is also more than just 'discipline', but might result in a much more virtuous lifestyle in general and to quote Aristotle 'We are, what we repeatedly do.'.
@philip People don't outsource their self-discipline to an alarm clock. You can't 'self-discipline' yourself to wake up at a certain time reliably.
@adamwolf Driving a bus is not only about comfort, but also about saving time. This sounds like you're trying to paint his dad's position being against tool-use. Or tool-use being inconsistent with developing discipline, which I don't see at all. If you just mean circumstances, where enduring a bit of discomfort is not costing you anything and has some muscular/health benefits, I think it's fair to assume, that the father is indeed one of the rare specimens, whom Mr. Money Mustache wouldn't punch in the face.
I don't see that implicit statement there at all. I think the statement is, that if you are only disciplined through an external force, you miss out on valuable character growth and/or become soft and weak, because you are reliant on someone/something else telling you what to do, instead of learning to do the right thing always and independent of context.
Oh, I didn't see, that you were referring to dreev. Bad reading comprehension on my part. Sorry.