Leave it at more money then. I have no idea how the guy actually thinks about the job, I can just see college coaching at this moment in time to seem much more chaotic than NBA coaching to some people.
College guys have to wear a lot of hats, NBA guys likely only one or two. Some people hate that, some people don't.
If you can get paid more money to wear fewer hats, why wouldn't you?
Let's look at some of the NBA championship coaches over the past 10+ years.
2016: Cavs / Tyronn Lue (fired in 2018 after an 0-6 start)
2019: Raptors / Nick Nurse (fired in 2023 after team missed playoffs)
2020: Lakers / Frank Vogel (fired in 2022 after missing playoffs)
2021: Bucks / Mike Budenholzer (fired in 2023 after having the #1 seed & losing 1st round)
2023: Nuggets / Mike Malone (fired in April 2025 with 3 games left in the regular season just before his team made the playoffs)
In the NBA, the average coach nowadays gets 3 years. Dusty May was never going to get fired at UM. Even with the hassles of recruiting, at least you have real job security in college when you're a winner. Yeah, he can always go back to college, but basically you have to be willing to make two big moves to make this one.