when becomes an adult then everyone has full responsibility for himself, everything that happens to him is the result of himself who cannot control his thoughts and actions, then it's not fair to say gambling is bad when there is only 1 person who becomes addicted out of 100 gamblers. Gambling has accompanied human life for thousands of years, and it will be like that for thousands of years to come.
One thing I want to mention here is that gambling is exciting but it is not a healthy hobby - it brings in trouble and stress and snatch all the wealth in a jiffy
so better safe than sorry
In our religion it is prohibited -like alcohol and adultery - these all mentioned above does not bring in any good . so better avoid them