Sometimes players get the yips and there is nothing a coach can do about it. There are some extreme cases of it. I'm pros and college. Gesell didn't come off as "unclutch" at all his freshman year. He developed it and it got worse. Last year the most unclutch player on the team was Jok. Now you might say Fran's coaching style makes players unclutch, and it is possible. But I say Jok was part of the teams that couldn't close out games and that's what caused him to choke late.
I am fine debating whether it's a player or a coach who loses close games. But that's not why I brought it up. My point was to tell you why I think like I do. It isn't about being ok with average, or being afraid of change. It's about me having a higher opinion of Fran than ones who think he cost us all those close games.