I am a little confident here, that gambling is a hobby, as well as a job, because they need capital and the ability to control emotions, so it can become an income, in addition, there are losses that can be, it is the same as us if working (trading ) Will profit and not a few also a loss
I am sorry to tell you this, but you are very wrong. Gambling can't be hobby and can't be job, when you go to job do you pay someone so you can work or someone else pays you for your hard work? Gambling is very dangerous way to earn money. Games that can earn a lot of money with the right skills and predictions in a match or bet 
And games where you can lose lots of money if you don't predict correctly.