What do you mean by "Gradual process"? The more you play, the higher your risk of losing. If you're lucky, you'll win a big win even in a single game, and then it's up to you whether to continue or not. The more you play, the more you'll be rolling, and considering the casino's position, your probability of winning is lower. It's important to stay where you're lucky and winning, otherwise you'll lose again.
I doubt the more we play, the more we'll win, but I agree with your statement that we can win big even in a single game. Ultimately, it depends on luck. I've personally experienced a situation where I had very little capital but managed to win quite a bit.
The best way to gamble is to do it sensibly, without engaging in behavior that leads to addiction or greater losses. Others understand that the odds of winning as a player are lower.