Hahaha, we will forget the loss because we can win some money from those games. That is what we did as a gambler, we always gratefully when we win but we will regret if we lose. That happens too with the other gamblers. But no matter if we lose, we still playing in the other days and we are trying to make another win.
Your friend was a very lucky person because of his win money, still bigger than his losses. I am glad that your friend can find another way to increase the money because if he still continues playing gambling, I am not sure if he can get another jackpot. That is what we need to do if we don't want to see another loss, especially if we can win the jackpot. But some gamblers still playing gambling even if they can win some money or the jackpot.