Wrong. You might be good at math, and still play the roulette; the difference is that you have to play it for variance, not for expected value (i.e. it's OK to

Wrong. You might be good at math, and still play the roulette; the difference is that you have to play it for variance, not for expected value (i.e. it's OK to lose $100 for a small chance of earning $100 000).