If gambling is giving you a good fortune then that is not wrong. And most of the time people is making wrong moves with gambling that leads to believe that gambling is wrong. I don't believe that gambling is wrong, it's business for the owners, investment for investors and possible profit for the gamblers, we just need to take control over it.
But if you look at the operators, investors and gamblers, the only 'looser" here is the gamblers. The one that have a good chance of really getting a profit in gambling is a one time bettor who hit it big time and never came back to play again so that his profit is intact because once you go back to gambling with your winnings, you are going to lose it everything in the long run.
That is true, the only loser is the gambler with the exception of whales, sometimes...
A whale can earn much money fast and dry a good part of casino bankroll, making the operators and investors take some time until they can recover the losses. In the long run looks impossible to have profit, that is why the whales get their profit fast.