~snip~
Not all kinds of gambling just depend on your luck. There are skill-based games as well. You have to have skills to play poker and place bets on sports, and you need good strategies to play dice, mines, and crash games. It depends on luck, but that does not mean I will make a deposit every time and go all in. I am sorry to say that your logic is totally stupid.
You are exactly asking me not to take medicine because I am going to die someday. As long as I have time, I won't die. So what is the point of trying to survive if god wants me to get back to him? Does it make sense?
Although it is true that some games do have better odds, like the ones you are mentioning, the reality is that the casino still designs those games, and only offers odds that are basically against the gambler.
Even on a poker match, between players, the casino takes a cut.
That means that even if a gambler doesn't lose any hands on average, they actually lose money because there are fees to pay per game, and if they play against the casino, then the odds are against them anyway.