If a gambler knows what's coming, then it's not a game of be gambling. It can't be certain that a gambler is going to win or lose, that is things that make gambling a game. If I know I will lose, I will definitely stay away from it. As a gambler, expectations are one thing that might make you greedy. Gambling is a game of luck; like this whole season, it has been very different from the time I have been watching and following sport. You can barely predict and get a win, but if, as a gambler, you are gambling for fun, it won't get you overthinking but just enjoying everything that plays out.
Though, that is why there are so many gamblers, because they have initial expectations of getting money of their session.
No gambler walks into a casino without having the expectation to win either money or entertainment, you know?
And the majority of gamblers initially seek to get money in exchange of their time in casinos and also bookies.
Also, it is kind of crazy how there are so many gamblers who are unaware of the existence of the house edge, it is a good example how ignorance and greed combine together and make people lose more money than they can afford to lose.