Allow me to speak more general than only about gambling, but you will get my idea.
Years ago I was very much interested in MMORPG game. I think the game stole 2010-2012 years of my life. I think I was so addicted to game, that it has started to give me troubles at work and during studies. I have tried holding myself from playing, but my record was a month of abstinence. But then all of a sudden I have lost interest to the game. I have returned to it after few years, and managed to play only for few weeks. Now I have only a tiny interest to it (if I accidentally see a video, I would watch it to remember good old times). I think that experience taught me how dangerous addiction is, that is why gambling never manager to catch my attention heavily and force me to make pauses because it start to cause troubles.