Okay.... I'm jumping into the jackass pool! ;) I have no doubts about earning that title for myself, especially since it has been reinforced several times in my life by people I respect labeling me as a mule.
We can all use statistics to support our point of view. Usually, the numbers can be massaged to support opposing views. So I'm not going to use them to make my point here.
From my experiences of playing for several decades, I will only state my own opinion on the "fools gold" comment.
I can only see it as negatively impacting the players that take 3s. I know it would negatively impact my production of 3s and I'm not over-sensitive on anything. I am King Jackass! I know it would make me think too much while playing in real time. This game is a game requiring players to play by instincts, not over-thinking. I am certain my 3-pt % would drop like a lead balloon if my coach announced to the world that my 3-pt shot was "fools gold." And I am only putting it in the context of the basketball world I played in.... a heck of a lot smaller world than KU basketball!
I've suddenly renewed my fan vigor for MLB play (thank you, Royals!). I notice how managers stick up for their guys, even when their guys are clearly wrong.... ESPECIALLY when their guys are clearly wrong! If a player gets thrown out of a game, the manager is not far behind. The key to all of this is that players need to feel like their coaches GOT THEIR BACKS!
To me, just my perspective, it felt like Self threw his trey shooters under the bus. I don't know how to see it in any other way. I think that was one of the few times where he didn't filter his comments like he usually does. I bet he would filter that comment out now if he could go backwards. He could have been a lot smarter on how he impacts his players to play differently then to denigrate part of their game.... and treys are an important part of the game!
That is just my 2 cents. There may be a stat out there that runs counter to my comment. If so, so be it. I'm just stating what I feel about this.
Calling out "fool's gold" on an action by a player or players infers that those players are fools. It infers that their actions are driven by the shiny gold prize they perceive it to offer. And, or course, the "fools" part attaches possession via use of a denigrating descriptor.
I'm glad no coach I ever played for called me a "fool" (just a Jackass! ;) )