Yeah I don't really buy that as the reason his dad isn't all in on UW. He's probably just proud and wants his son to got to a nationally relevant program. Its not like we're the only school with a good pitch.
I don't know his personal situation. But for a school like UW, being a local kid, there's generally little upside to leaving.
He will get full minutes in year 1 here. UW will be top 2 pretty much no matter what in conference, meaning he'll be noticed. We have had many top picks the last few years, it's not like he's going to a forgotten program like Cal, or TCU or something.
If he leaves, goes to a blue blood like Duke or Kentucky. He won't stand out as much and the local community won't care, he'll be just another rent a player.
If he kills it at Duke, he'll be just another in a long line of players. If he kills it at UW, he'll make headlines.
That being said, he goes to Kentucky and hopefully doesn't flop like Terrance Jones.