Yes there are some really bad coaches who don't hang around the NBA as coaches for too long but Triano is not one of them. He has already shown that he has the ability to develop young talent, a quality that many coaches do not have. Why, because it takes time and guts to put young inexperienced guys out there even if they have a very good or better upside. It is a lot easier to go with the experienced pro who has stop growing even though the upside of the younger guy is superior to the level that the experienced pro has maxed out at.
Generally speaking coaches on the average make a greater difference at the grade school, high school and college level levels than they do at the pro level.