Hobby means someone is passing time or spending time and if gambling is involved then it means the person is passing time with gambling just to kill time, this people just gamble because they are bored and don't have choice but engage in it but you see habit, it can comes in two ways. There are gamblers that has habit of playing and losing a game a day and nothing is going to change it but another gambler can have the same habit and makes money every day.
But hobby can be done more often than we only use it occasionally. You see when someone like football and use football as his hobby, he will playing football too often than the other activities. If he can treat football as a sport, he will not playing gambling too often but only playing gambling if he have a spare time.
He will playing football when he wants and he can fills his spare time with other activities. He knows that football is one activity that he can use in his spare time but not too often because he must have more energy to play. But no matters what, if someone can treat gambling as an entertainment, he will not lose much money and that is what he needs to remembers.
You are misinterpreting this two words. One can have gambling as hoby but has never for once look at the benefit side which side of the gambling but you see habit, they both like fun and the money invokes but one can practice his own in a good manner and win every, there are people that have good habit in gambling to win everyday for their life and we have another ones with bad habit of always losing and don't just know when to rest or leave.
Most people can't use gambling in a good manner because once they feels the fun, they will forget with all the things that they must do in gambling. That makes them spends too much money without thinks about the other needs in their daily life. Gambling as a hobby needs more money so that can impact to our financial and we may spends a lot of money just to fills our wanting.
That will not be good for him because he will not knows when he can wins in gambling instead will have big chance to lose the money. If he lose that money in gambling, whether he use gambling as a hobby or habit, that will makes him frustrate seeing his money lost in gambling. Not many people have good habit in gambling so that should makes us thinks how we can treat gambling as an entertainment. You should thinks twice if you wants to use gambling as a hobby because in this matters, you will use much money more than usual.