i think i understand his point, it quite legit, and it a common popular thought. life is a big gamble game, full of risks. cheating on wife is a gamble, the wife finds out or not, both can happen, each has its own chance to happen, nothing is abs 100%. the wife never finds out is a win, the opposite is a lost.
just read 20/300 pages for the test is a gamble, pass the test and become the winner, or fail it and remain a loser...
I think you are right but the OP may want to know whether gambling is right or wrong because you see many people burn their houses, and everything they have just to gamble, so in a manner its wrong little bit, but yes you are 18 + and you should have control on yourself so yeah its legit too ...