It's not right to say almost all gamblers since there are gamblers who can fully control themselves. It's true that majority of the gamblers doesn't have any control since casinos is still thriving and earning their money. I believe that becoming an addict is a come and go situation in our own life. Majority of the gamblers will realize it themselves in the long run as I realize it on my own that it is not a good thing to still continue the lifestyle of being a gambling addict.
While I agree most gambling addicts will eventually realize they have some gambling issues, the problem is everything that happens until they make that realization, if this happens early on then they will have an easier journey getting out of their addiction, as at most they would have lost some money and that is it, but there are also a great deal of gamblers out there which fail to realize this on time, and by the time they do it they have lost their jobs, health and even their families, and this will make their recovery journey way harder.