Basically,gambling is not predictable it can be based on luck or by chance.We often say gambling is a game of luck,you might get lucky overtime but the probability of having much wins is majorly dominated by the chance.That's my favourable experience so far,the earlier we understand that Gambling happens unexpectedly the better for us.
Many people dont believe gambling is both luck and chance. And by change we mean being in the right place at the right time. We cant be lucky if we dont make analysis that we make us settle for a good odd. Except in casino games that I do believe in randomness. Any game that requires skills to function, it sure have to be both luck and chance for us to in. A typical example is sports betting, poker games (table games in general though) etc.