If you encouraged you son to do no opening preparation, aside from general principles, encouraged him to turn up at the board physically fit, full of energy, co

If you encouraged you son to do no opening preparation, aside from general principles, encouraged him to turn up at the board physically fit, full of energy, concentration and determination to win instead of tired a sallow from spending all his time studying, then he would be killing it even more. Those other players may now and then score the odd point from their preparation, but usually only against other preparation junkies.