Forex vs Gambling. Is there a difference? (2)

Let's take a card game for example. The rules are quite simple. It is dealt one card to a banker (casino) and one to the player (real person) and all you have to do is bet on one of the two cards.
Since both the banker and the player have the same chance of success, it seems that chances are 50/50. But in fact, it is not.
Casinos change the rules by adding a small commission or lowering the payout if the banker turns a higher card, the scales slightly tilted to the casino. It may be a slight advantage, somewhere at 1-5 percent, but it is enough for the casino to make a profit after a large number of games played.
To become a successful trader, you have to trade like the casino by using your advantages.