If there are 100 people that have not gambled before but about to start. If they tell them to gamble and people are seeing them while gambling. Not all of them would first win. Some people will win while some people will lose. I know someone that gambled for the first time that lost the game immediately and he told me he is no more gambling again.
You are right about that, not everyone can have the same experience, what works for you can't work for someone else. I remember how a friend of mine won up to 250 thousand naira on his first trial in a casino game, he wasn't expecting to be that easy. His stake was about 2 thousand naira, after winning such a huge amount of money from a little stake he decided to keep pushing his luck to see if he can get lucky with it. Unfortunately he lost everything on his second trial and after that he has been incurring a lot of losses. Whether you are a beginner or intermediate player you must learn to do it moderately otherwise you'll end up ruining your finances.