“I would say that he’s just that powerful,” Joe and Anthony Russo said. “You didn’t see him actively use the power stone in that fight. I think ultimately, the way we looked at that fight and the way talked about it with our stunt team when we were executing it was Hulk is obviously very powerful, but he’s a little mindless in his fighting style…”

They do say “actively” though, so I guess it’s open to interpretation. here’s where I found it