well some gambling don't need to be lucky because sometimes we just need strategy and knowledge for us to win in gambling. And the gambling experts always win in the game, because they are professionals, and they always doing this to gain profit.
Nobody called himself is gambling experts/master , rather than we called them gambling experts we can see this type of player is really discipline for manage their bankroll as well with the progress of match (includes temper and emotions) and that's why they're usually keep get profit and it's hard to lose with this behavior. We should follow this at least , for minimize the risk.