Yeah, that's the one thing that impresses me. Plenty of people with actual day jobs graduate. These people work at least 8 hours a day, no way Chiellini is training that much. But to do it completely voluntarily when you have more than enough money, yeah that is impressive.
Training more than a few hours a day would be really counterproductive.
It's mostly not that much of a dream job because you really have to follow a strict diet, take resting extremely seriously and refrein from going out/doing a lot of fun stuff.