"It's good to learn from others, so you don't have to learn expensive lessons yourself"
That's true. Although some lessons have to be experienced to be learned, avoiding silly mistakes can go a long way. Learning from others would mean reaching out to/ reading from true crimes and confessions althrough the period of the horrible experiences they've had.Quote
I read this quote long ago, and I have been learning from others ever since 
Good for you!Quote
I know people irl who destroyed themselves/their families by gambling activities, there is this story of Mahabharta [1] where king Yudhisthira was led to ruins by gambling — so what saved you from doing stupid in gambling?
I haven't read about the story from the link below, but the self-awareness on matters that concerns bad decision in gambling was enough to put me in my place. I don't gamble what I can't afford to lose.