A philosophy is one thing, and a state of mind is another.
Unless you have the intent to kill, you will never win a fight. This was Bruce Lee's Philosophy. He is correct in saying that. So these martial artists can preach a free mind all they want. Bruce is perhaps the fastest and strongest martial artist we ever had and that was all due to him having the intent to kill.
This free mind or no mind philosophy is pretty much bogus horse crap.