This is the NFL jr now. You don’t get a decade to establish relationships and build a practice regimen. The right guy will figure it out immediately. There are probably 6, generously speaking, programs who don’t need the right guy and maybe 10 coaches on earth who are actually good at this. Once you’ve identified you aren’t one of those 6 programs and don’t have one of those 10 guys you move on.
Humans aren't static video game characters without development. Timing does matter as you look at guys like Harbaugh who took a bumpy path to win one, Dabo who won with the best then fell off, Ed Orgeron who held the wheel steady with his eyes closed then got fired.
You're trying to simplify and put in a neat box one of the most complex organic jobs in existence. There's many different paths to being a successful coach and there's no such thing as a finished product for what the game is and what it demands.