I think you dont get it. We are here talking about losing, not about winning. A person wont confess that he has won not because he is greedy and dont like to share method he has used to win, but because its random, there is not method or strategy that will lead to constant winning. But my idea was that people dont share information about their losses or fails. As they are uncomforted saying that, because they are afraid to be laughed at or misunderstood.
On one hand I dont see a problem to tell that I have lost or won either. On the other hand, I have never won or lost significant amounts, so I cant tell how I will act if I had $100k, and next second I dont have them. But my idea was that if a person has lost a lot of money, most probably he will hide that info to avoid judgment or strange looks. Because nobody likes to confess that they are losers or fail.