Yes, it is true that not all gamblers win the first time they gamble because when gambling is based on luck, winning is uncertain. Those who gamble based on luck, if they win first, they appreciate gambling a lot and those who lose first may lose some balance towards gambling. However, if a beginner wins at gambling first, he will become more interested in gambling and will prepare himself for gambling later. When I first started gambling, that is, when I was a beginner, I won at gambling the first time, even though I was a beginner, I still won at sports betting because I had some experience in sports.
Maybe some people really gets their luck in their first time playing gambling while other beginners will not get the same things as them. Usually, those beginners come to casino because they are curious with gambling and they want to try how it feels. Suddenly, they gets their first winning that impress them so that can makes them think that they can lucky in other days. At that point, they must realize that their luck can not come every time they gamble so they must hold their back not to playing gambling too often. They must know how to control themselves before they playing gambling so they can think that winning in gambling will need luck and many things so they will not force themselves to keep playing gambling.
It's just a good timing when they place their first bet or it's their lucky day when they hit that decent amount and win something out from the house, though like what you just mentioned not all have that same outcome, there are also gamblers who loses a lot but didn't find any chance of experiencing any luck to back their bet up, losing their first try and unable to cope, some of them continue to bet and lose more while some did not want to experienced another and wisely quit and stop.