BU has said repeatedly that he tells the guys to shoot and to continue shooting even when they're missing shots. so I really don't understand where the hesitancy to shoot has come from the last few games when we have wide open looks.
Good question, and who knows what the answer to your question is.
I will say that sometimes a player hears his coach saying "he's a good shooter, he just needs to hit them" in a counterproductive way, feels pressure I mean. Or sometimes a player hears a coach's encouragement to "get yourself going by getting some easy shots first" as criticism.
Or sometimes a coach's exasperation with missed shots -- let's say across his entire team, not just one guy -- is unfortunately heard by one particular guy as pressure to "Make a shot, dangit!!" I've heard that latter expression, or versions of it, a lot and I never think it is something a kid you want to have shoot the ball should hear.
Finally, a lot of the best in-game shot makers are kids who just don't ever give a **** what ANYBODY (coaches, team mates, dad, fans, girlfriend ...) thinks about their shot selection or how many misses they've piled up. It is weird that, from a coach's point of view, you almost need a me-first guy or two like this, a guy or two who despite substantial recent failure (say 1 for 7 in a half) is nonetheless certain his next shot is going down. That kind of belief is hard, or in my view impossible, to teach. You can stoke confidence, but in the end, blind belief in oneself arising from who knows where within is what cold-blooded shot makers just have.