Casinos always win. We can't deny it because that's where their business is, and casinos try to win even if they win easily. While gamblers have to try hard first to win, only a few can even be counted on the fingers of anyone who wins. The others had to return home defeated.
There's always a large percentage of people losing then winning and that's how the casino stay in business. Without this happening this way then the casino would had ran out of money to payout to their winners since we have people winning daily.
But because, when you compare the percentage of those winning to losing, there losers are always higher and that's because people don't gamble responsibly, people still gamble for revenge or use their emotion which are very wrong ways to gamble.
Gambling irresponsibly gets you addicted and when you get addicted then it becomes an issue to win bets as you'll always lose. To gamble responsibly, then you have to know your limit and set a standard that you'll following to prevent irresponsible decisions like over betting.