True; but there are some things you can do. Your mind cant think of two things at the same time so theres distraction to avoid anxiety,you just have to realize when your ego is chatting away in order to be able to instigate the new thought.

In the ring if you really enjoy yourself in there and you are not there to prove anything to anyone, then your mind is more free to allow you to fire your electrical thoughts through and get 'into the zone' than someone who has an ego issue and the related worries that go with that.

Like pleasing your home crowd ,family, team, trainer etc via your own ego.

Separation between mind and ego helps you become spirit/mind/body like the true ancient martial artist. Its like time which has reaction to your timing. Your own ego will stop your timing. A real master is the time, they embrace everything in the moment so that they can become the moment.

Its funny because most who can do that have already murdered their own ego and dont require anything (that is real true freedom). So the majority of them dont compete with others even if they are forced or decide to physically compete, as they have won the biggest fight (the internal egoic one) and are free of it now.

Ego is good though, it is where fight and flight came into being and we require it. But which has a hold of the mental controls? That is the big personal question and the locked box holding the key to unchained freedom.