Except for people that take the act of gambling for fun who are really not affected by gambling so many people have uttered these particular quote noted above
If someone is an addict, best is to quit gambling, or to just leave gambling for some months or a year. The day I decided to quit, I did not look back, I quit until I have control over it. I remember when I quit for a year, I started to gambling again and I noticed I lost and I quit again. Then I knew that I have control over it, but started to use small amount.
I had a friend, he was the first that lost huge amount of money to gambling, the money belongs to his mother living abroad. It was a disappointment when his mother needed the money but later found out the truth. He quit gambling till this day.
It depends in my opinion, especially those that gambling has thought a lesson will not want to gamble again. But supposing gambling as been taken as fun, quitting will never even come mind.