I'm a lawyer as well, for 30 years as of this fall. There is literally no comparison between the professions of attorney and college head football coach, either from a stress or compensation standpoint. Those two things are about as apples and oranges as it gets.
Saban is 72. he didn't retire early and "give up the gravy train", he retired late and kept the gravy flowing. He made over 150 mill in his career. He will now make whatever he wants, certainly millions annually, in the media and advertising. he may even join a corporate board or two. Saban is in his own category as a college head coach.
Partridge was an assistant making 540k a year at Pitt, he's almost certainly making more now with less headaches. Hafley is young and was in a dead end HC job making 4 mill. He was not long for the chopping block, MAYBE one more year. He was vocal about how much he disliked NIL etc., but again, he knew he wasn't going to have that BC job for more than another season at best, and he had a great NFL job offer fallin his lap. The Packers reached out to him and offered him the DC job. he probably makes 50-60% of his BC salary, and he got out of Boston ahead of the hangman. He is 44 years old and if it goes well at GB, he will be the next hot commodity for an NFL HC job. So for those guys, it made sense to leave college football for the NFL. For Narduzzi, who is a lot older than Hafley, has a much better job, has more job security, has no future as a NFL head coach, and is paid much more, it does not.
Of course college head football coaches "can" leave a job they're unhappy with. But barring exigent circumstances that don't exist in Duzzi's case, they don't. Being frustrated and pissed with the new college football landscape is not going to cause him to bail.