In order to master a specific game, the game should be games that requires skills to play. You can master some skill based game such as poker, sports betting, and maybe blackjak (by card counting). Dice and slot? Nope, you may understand all the knowledge or basic information about the game but you cant master it.
I absolutely agree with you To increase your chances of winning at gambling games need to switch to the game in which the probability of winning will depend on your choice and the skills that you need to develop. Playing slots, dice to develop some skills exactly will not work.