I too think the "warrior" image isn't the best one for individual traders. If anything, the biggest opponent is our own self-- the reactionary one that gets in the way of doing our best-- and rather than "fight" that one, we need to bring it to peace.
Tao oriented martial arts training strives to get beyond the concept of "the self" at any level, thus the "trader warrior" imagery as a vehicle to get into a Tao mindset. Tao is intellectually appealing, but I found Vipassana meditation a more direct and less mumbo-jumbo way to "know thyself".
At any rate, I'd wager many aspiring traders like the warrior part, in fact feel they are fighting the market or other traders/manipulators, etc. Connie Brown's book "Aerodynamic Trading" also capitalizes on the athlete imagery and throws in Tao for good measure.
She tells a good story of two old masters meeting in a competition. The two old boys square off in the opening stance. And so they stay, completely immobile. After 5 minutes, the fight is called a draw. Neither reacted, not even a blink, for to have done so would have tipped the balance, leaving an opening for the opponent to strike. Mind you, it sounds like not pulling the trigger to me (lol), but the idea being that it isn't the fight against the other, but ourself, that wins the bout.
more thoughts on this, but this is overlong as is.
amg