Yeah, this is accurate. I know some have learned to hate the man. I think that's a shame in some ways but I really do get why people want him gone. I'm fine with that, not that my opinion matters.
I don't think what Cal does, and why so many of his former players do so well in the NBA, is about Xs and Os or even situational coaching. I think it's about helping these guys get their heads on straight, learning how to become the best version of themselves, to work hard and not expect things to just be handed to them, learning how to be grateful, to give back, and to have respect for the game and opponents. I don't think SGA would say Cal taught him how to play the game or how to know what play to make. I do think the atmosphere, playing against top players every day, contributes significantly to this. At UK, the atmosphere is similar to a pro team. Having BBN putting pressure on is also helpful to these guys. If you can make it out of UK and the pressure cooker without losing your mind, you're going to be mentally tough.
Now, how much credit goes to Cal? Quite a bit. He created the environment. He motivated Shai to push himself to be the best. Some credit goes to UK, some goes to the pressure to win brought by BBN, some goes to other UK players battling him, and so on.