Well, it's true that I also agree with you that there is no negative effect in my opinion from the early withdrawal option provided by the casino for gamblers before they finish all their last bets, in fact it is good because it supports the prevention aspect by stopping at the right time before regret comes because as you said that we never know about what the results will be in the last game if we continue it.
On the other hand, your opinion is right in the second paragraph that you said, but the problem is that there are always some gamblers who think that if they continue the game, their winnings will be even greater and maybe that's what makes it difficult for them to cash out from the start, even though it is clear that we never know what will happen in the last game, and on the other hand as we know that coming out with a win is always much better than nothing at all.
If gamblers thinks like that, their chances to win could be drop because they must know that everything can happen in the next last minutes. From the chance to cash out that available to lose that chance and makes him really lose his money.
That is why gamblers should be wise with the current situation so he can decide with right and takes the benefits from the situation. He can let his chance if he want to wait until the match is end but he must realize that the chance can be gone anytime so he must accept that if finally he lose his money.
We should not be too greedy expecting win bigger if we don't know what is the situation that can happen in the field. We can take the cash out option and leave the games while we can place another bet in the next chance.
Actually, everything comes back to the readiness of the gambler himself, in the sense that regardless of the results, of course they must be able to accept it, such as if they prefer to continue the game until the last match and do not want to take advantage of the withdrawal option provided by the casino, then it doesn't matter, you are free to make decisions, but one thing to always remember is that in gambling the next result does not depend on the previous result, in the sense that when you previously won, for example, it does not mean that in the next session you will win too.
So before you continue, you must understand that first and prepare yourself for any possibility that will happen, such as experiencing defeat because the last match did not match your predictions, don't let your decision lead you to regret, that's all.