I don't know about that.It worked for Bruce Lee.But his "Don't think,feel" quote applied to in the moment of combat having confidence in your own ability to execute when you need to,to the point you don't need to think about what you need to do. An player that isn't confident always second guesses himself and doesn't make a quick smart decision. A player that over thinks has trouble adapting to their opponents change of strategy.
So I wouldn't call it scrub talk if a person is capable and confident enough to where the "Don't Think,Feel" philosophy works.
I was talking about what he said about Jann Lee and the dragon gunner.