Sure I can. You get time between games and a fresh slate with which to work with between games. Within a game, you're already down big and the calls aren't going your way so you mentally check out.
Your arguments lack depth and deep thinking. It's all shallow sports media talking points.
Think of it this way, you have to choose one reason why the Warriors blew the lead last year. Would you choose something illusory and intangible like momentum or would you say Green being suspended, Bogut getting injured, and Igoudala's back giving out?
Green and Bogut being out means bums like Festus Ezeli have to play extended minutes. Iggy being weakened by his back means trash like Barnes have to pick up minutes while giving you no production in the game. That seems far more tangible than something like momentum.