*The context for the phrase in which it is used is blackjack.
1. Gamblers' superstition about the "flow of cards", and how their luck could circumvent events that would lead to either winning or losing games, thanks to this otherwise arbitrary shit.
2. Gamblers' understanding that the cards do not follow any form of pattern, and that the randomness of it is what's either going to hand them the win, basically letting math and the whole entropy of the universe do its thing
One of these are definitely a healthy way to approach the game, the other a bit more toxic as it gives you the false impression that you're going to win games, long as you follow a certain pattern which in reality is something that doesn't even exist in the first place.
Did you know that there are more possible permutations of card order in a 52-card deck such as the ones played in blackjack, than stars in the universe? That alone should paint the slightest impression that no amount of sleuthing's gonna give you an upper advantage, especially when you're banking on a certain pattern or trend of cards to come up.