When someone is completely addicted to gambling and when gambling completely consumes someone, his mindset is that he always thinks that gambling will change his life and gambling will make him a big rich. But something like this never happens, the opposite always happens. And slowly gambling destroyed every hamblers life
It's obvious that most gamblers lose more often in the long run due to house edge. However, gambling and any other risky activity will not ruin a life if a gambler is disciplined and follows bankroll management. Unfortunately, many inexperienced users take losses too emotionally and end up losing all their money trying to grab the jackpot.
Gambling addiction can easily be handled through self-control and setting limitations to your gambling activities, once a gambler becomes so addicted to the point that he now builds his life around gambling then you should know that such gamblers will lose money and will be thinking he will recover back through the next bet and that is how casinos generate their revenue.
Casinos will always set their system in a way to suit their house edge and place it an advantage over the gambler, so he just keeps losing to the house every time.