Profits are already profits! This cash-out feature in some gambling platforms is new because, in old or traditional gambling platforms, you can't do this.
And many still don't like it. They're given a chance to withdraw their profits while they can if ever they want to pull off their bets.
But if they don't want to take their profits and still want to proceed, it's okay and if they want to continue with the traditional approach.
Profits are profits, but others do not prefer to take it because they want more profits. I know majority does that thing. However, losses might be waiting ahead once we decide not to cashout. That's why we should carefully assess our game if it will be more profitable or not, otherwise we will only lose our profits on hand.
That is the mistake that they do, if they have profits already they should have take theirs already. But if not and want to continue, that's what they need to make because if they don't, the problem is going to exist in front of them and regrets will be followed by that very bad decision that they have made.