I haven't seen someone who takes a big risk in gambling who tells the story of their risk in a good way that it pays off for others to learn from. What you hear mostly from them is bitter complaints about the big losses they have made in gambling.
Yes, that's true the ones who take risks in gambling especially those who take big risks often end up with huge losses. In the hand house always wins and that's my own personal experience. In sports betting someone's luck can still help him/her to to win even if he/she takes big risks but in casino games it's not worth it to take big risks.
It is certain to take risks in gambling as a result of experiencing a big defeat --- basically the victory of gambling is small only relying on luck while the bookie is certain to win. In sports betting even if you do a fairly far analysis for a bet, the luck factor is still there, often we experience bad luck in Sportsbook betting because some matches are still unpredictable.