βHe who knows others is wise; he who knows himself is enlightened.β
β Lao Tzu
Knowing the chances is knowing others. Knowing oneself allows a person to use that information to the best personal advantage.
Can't understand why this is an either/or discussion. I would advise youngsters to get all the objective information they can about any prospective professional endeavor, and using self-awareness, apply it to their personal situation.
I suppose there can be such a thing as too much information. But I would hesitate to advise a youngster to ignore data...unless I thought he was incapable of understanding it.......or had very little self-awareness.
Edit: in which case he would be neither wise nor enlightened