no matter how great your strategy in gambling, you will never win.
That is correct because gambling is not made to make money but is meant for having a fun. If you use it to earn money from it then at the end you may lose lot of money and don't even enjoy the games. Hence don't use gambling for earning money.
Although there is a chance for every gamble to win in gambling but that is hardest job to do and maybe for the total gamblers who attempt that, only 1 percent succeeds, and that is a low success rate. You need to be very lucky to win in the gambling.