The NBA doesn't like to see anything from college coaches at this point in time--it's a hard barrier to cross straight from college to an NBA HC job. In the last 15 years, Hoiberg, Donovan, and Stevens are the only ones to try. Hoiberg was a disaster, Donovan is about to lose his job, and obviously Stevens was a star.
Most guys are working their way up the NBA ranks directly now. G-league assistants, player development, etc. Like Daigenault did. Honestly, I haven't even heard of half the NBA head coaches. Whereas guys like Calipari, Hurley, Scheyer, Pitino, etc. are pretty household names for people who knows sports.
Billy Donovan is the only current NBA coach who went directly from a college HC job, and he only ever made it past the first round of the playoffs his first year. I'm not sure he's a sought-after coach by any means.
Considering the lack of job security, the different role as more of a manager, 82 games + playoffs and travel... I'm not convinced an NBA job is something Hurley wants. Or honestly, that the NBA will even want HIM.
He's also making more than plenty of NBA coaches and is darn close to average.
This article from 4 years ago was interesting. Donovan and Stevens are the only college-to-NBA coaches in the past 30 years to have a winning NBA record. A number of those guys were NBA players, and we're talking about 11 coaches total in the past 30 years.
TL;DR: I'm not buying it. The NBA doesn't want Hurley, and Hurley isn't suited for the NBA. There's remarkably little history of college coaches having success in the league.