I don't believe that it is possible to win gambling games by reading some books or watching YouTube videos. Let me just put it in the real way. Gambling is a luck based game. There is no place for skills here. So far, the human race has failed to come up with the mantra that can be used to tame luck. Moreover, the house plays its own cards, making the win even more difficult. It is best to stay away from gambling.
You are making no point because gambling involves skills for any gambler to be successful. Good to say "gambling is luck" but not all gamble platform that agree to this; like poker. Poker requested more skilled players to play with their skills before they can win. Skills matter in gambling.
yes poker is a pure strategy game, but when you play poker with emotion and always All in when you have good cards, it's no longer pure strategy but you play with luck. There are no secrets in gambling, you will learn from your own experience how to win it.