They tend to only think about the winnings that are not yet clear that they will get. People who gamble wisely and only play with the aim of having fun can be upset when they lose, but they can forget about the defeat by leaving gambling for a while, unlike people who play gambling unwisely when they lose and are upset they will return in the hope of recovering the losses they have lost or catching up with the losses. So it's true what you said, for beginners, hopefully they can play gambling smartly, including being able to control themselves and limit their games.
People who gamble wisely will not think about anything other than gambling to get pleasure because that is their goal in gambling. They will let what happens to them because they already know that that is what they will get if they gamble. They also will not despair and get frustrated if they experience defeat because they can prevent big losses by stopping the gambling game. And that is clearly different from people who want to win or recover their losses because they will keep trying until they succeed, but they will still have difficulty getting it.