Chaplin
Better off silent
Ultimately, everything bad or good is on Sarver (and his as-far-as-we-know silent co-owners). He/they decide who to hire to help run the team and listen to them or not as they choose. So blaming Sarver for whatever you dislike about the Suns moves is hardly irrational.
But giving a free pass is definitely irrational. If Lon Babby or Lance Blanks or Alvin Gentry go to Sarver and say they want a guy, and then give reasons why it's a good idea, then if Sarver says yes, why does he have to take the brunt of the blame if that move backfires? He certainly deserves some, maybe even a lot of the blame, but certainly that doesn't mean other people in the organization are free from responsibility.
We go on and on about how he doesn't know anything about the NBA or talent--why should he take all the blame for relying on someone who is actually supposed to know?
Sure, he's at fault for hiring the person, but let's face it, he may not be a good NBA team owner, but he's a savvy businessman and you don't get where he is without learning how to hire people you trust.