They're still a basketball team, not gods. They can be beaten just like Miami could be beaten by a team of mostly D league players. All it takes is to find their Achilles heel. Easier said than done, but the Rockets have gone after Steph relentlessly to the point where he's even lost some of his swag until he gets back home and even then only after he hits a few long range shots. KD probably feels like it's on him. Steph isn't 100%, his shooting is still off just a bit and he's hesitant (did you see him pass up that wide open look last game on that steal?, never happens otherwise). So outside of the big 3, they have no real offense other than Iggy. He's injured.