A quick note regarding the hiring of high school coaches for college.
Obviously this is just generalities, but the widely known high school coaches fall into three types for me: the cult of personality coaches (Arcadia, York, Saratoga), the ones who had a generational talent at their school (Brosnan, Raczko (admittedly forgot about his coaching under cook (d'amato was after, talking about hiring in 2001) , Bruce Edwards, Judy Fellhauer), and the verifiably good coaches, repeated success with a small team (Pat Tyson, Bill Aris).
Depending on what you think matters for success in college coaching, if you think coaching is easy and recruiting is most important, hire a likable cult of personality coach; if you think coaching is important, hire a verifiably good coach. To me, hiring a coach who happened to have a superstar at their high school is a big gamble, especially at a big name D1 school.
Gregg Popovich coached at Pomona and ended up being one of the top NBA coaches of alltime. Before Arcadia, Jim O' Brien was a non-notable coach at Caltech, after he coached at Whittier. Brosnan is young and there are lots of SCIAC and other college coaching jobs in LA that aren't UCLA where he could prove his college coaching ability.