You are all quite optimistic you'll win.
Gambbling is a lucrative business because players often DON'T win.
Unless you plan on cheating...
You're right....people plan on cheating. Save, gamble, win, save, gamble, lose, reload last save, gamble, win, repeat.
Maybe the game would be better if we couldn't save while in the casinos but I'm sure people who really wanted to would run out of the casino, save then go back in and gamble. So I suppose from that point of view, a cap on the ammount you can win stops you using the gambling games as a way to unlimited money.
The objective when gambling is to make money, if you lose money that is counter productive to your goal and if you keep losing money it would take a strong willed person not to just reload and get all that lost money back. I'm sure everyone on the forum will suggest they are that strong willed but just like those people who claim they want a fair fight what they secretly want is to win all the time while feeling like they could lose without ever experiencing it.