For me gambling is fun.
Most gamblers take it as fun at the beginning but day by day it turns into addiction for them. Actual problem arise at that moment when they wanna choose it as an option of earning. Its quite tough for them to get out from this habit and its common with most of the gambler. I don't think that they don't want to quit but addiction of making faster profits drive them hard which start to create unexpected problems in their real life. Getting out from this habit isn't an easy task for all but some guys can survive due to their strong self control.
Continuing gambling is okay until it starts to control your own otherwise it will definitely bring negative results for you. Some people still exists who have enough wide luck to make some easy money from gambling but it doesn't works for all. In my personal view i think only they should continue gambling as a daily habit who have enough backup to recover their losses. If you can't afford to lose then its better to keep far distance.