When you come back there again to restore your lost money then you become very addicted. So if you consider gambling as a means of earning money then you are a real gambler, you find a way to control yourself.
This has being a constant reminder to all gamblers to gamble without intentions of earning money but basically even without getting anything from it people get hooked along the line. But then i quote you wrong saying earning money from gambling makes you a real gambler. Absolutely it doesn't the fact that you gamble and know when to stop makes you a real gambler.
Even for those that have a come back to continue in gambling after they made a big win, if care is not taken, they can end everything back to gambling before they realized, for any gambler to fully enjoy gambling without misplaced priority, then they have to clear there mind that they must always win in gambling or depend on it for a survival, sometimes gambling could be disappointing and we must understand that people often lose than wining in gambling.
It's not sometimes, but gambling has always been disappointing. If it weren't for the wins we get sometimes, most gamblers may have quit a long time ago. It was the thought of hitting the huge win that kept an addicted gambler from coming back.
And those who come back right after winning huge money will end up empty-handed most of the time. The casinos or slot machines don't give out a lot of winnings frequently.