I don't know that it's dumb. And right or wrong, all NBA coaches do this. Much like a pitching staff, NBA players need to know their roles, when they get playing time, etc. If you just stick with the hot hand, Giannis will end up playing 48 minutes in most games, and Parker in many. (That's extreme, but you get the point.) It's a long season, and you need the bench to contribute. One thing Kidd does that I love, is that he WILL go with the hot line-up at the end of games. There's really nothing set there at all, could be anyone in there for the final stretch.