Remember GSW had a perfect storm that parted the sea last year creating a great opportunity which they executed to near perfection defying the odds. What phil spoke of then was in those terms.
Kerr's team responds by winning 73 games and within a game of repeat.
Thus, I don't think you highly get on him. Hindsight will tell you a lot of things he should have done. Also, he relies on his players to adjust, which is straight out of phils playbook. Sure we can say what he should have done, but its not that they lost the game, they got beat. They went for history but did not have the last bit to put them over the top. This was the sociopath will that Jordan had in willing his team to victory in his tenure.
Lebron has different approach, but a very strong resolve never the less.
So Kerr gets a pass, why? He has done a great job, near perfect up until then!