Until the quants can effectively program 'the character of the price action' and if/when it changes, a good human trader will always be able to beat them. And no, I mean far more than some dumb volatility level going up or down re the character.
Computers don't understand subtlety, character, nuance, perversity, when right is right and when right is wrong, the list is endless what they cannot do so again, until they can do all of this and much more, a good human will always be able to out-perform them.
Computers are of course great for number crunching and speed but one can be weak on those but still clean up.