Where's the "Not upset at all because I trust Ainge than any CBers" option?
It's not really CBers opinion, it is the opinion of almost every scout who make a living watching these guys live and studying their film. Obviously scouting isn't a perfect science, but if the consensus is that Fultz is the best player in the draft, I don't really know why Ainge would feel the need to deviate from this.
CBers would only be angry because Ainge would have gone rogue on an otherwise crystal clear decision; it isn't the 16th or 23rd pick we are discussing here.