Gambling is addicting because it is a way for you to earn money without any skills required. Unlike other methods of earning money, you need to have qualification and knowledge, gambling dont. However, they dont want to know that gambling also make you lose instead of win.
That is a complete misunderstanding about gambling. Gambling shouldn't be called as an earning money method because they are made to give us just an entertainment and to keep things more exciting kept an option open for gamblers to win big money if they are lucky. But if gambler tries to chase the win then they may lose a lot of money in gambling instead making money.
Neither it is an money making method neither its a fun activity. Actually consider gambling like you spend money on picnic and other things, now if you are spending too much in picnics and enjoying would you call yourself addicted ? Well I wont. It is just that we need to control it and change the lifestyle a bit.