My comment doesn't really have anything to do with vets vs rookies. Corbin just seemed, from my perspective, to lack creativity. He also seemed especially bad at preparing the team for short clock situations. He took very few chances and ran the team according to the book. The old book.
To my view, he was indecisive and confused, did not have a plan or a vision. How long did it take him to get assistant coaches because he did not know who he wanted. Compare that to Steve Kerr who had it all wired BEFORE becoming head coach: assistants, strategy, vision, tactics, even individual player development plans. And notice the praise heaped on Quin by Harpring about how practices are now run.
The best the Ty "vindicators" can do is come up for some excuses for his failures. They do not point to, nor can they, anything significant that indicates he was a good HC.