When Kerr was dealing with injuries in the 2017 playoff run and had to stay out, Mike Brown took over and the team went... 11-0. Kerr benefits big time from having that stacked Warriors team (Curry, Klay, Draymond, Durant in their primes + really good role players).
Still think USA is gonna drop a game at some point in which case there'll be a lot more talk about him and his decisions.