There is no safe way to gambling as it involves risk taking it's either you are losing in gambling or you are gaining there are only two options there is no intermediate between the two so it's now left for us gambler's to be careful while gambling and always not be taken over by gambling addiction because you are going to be the one on the lossing side because there's nothing safe about gambling
I think that in the long term it may be difficult to retain discipline and not crack eventually. Even if you really try, you will sometimes have very bad days and some people even go online when they are drunk. At those times your discipline will be lower and your habit of gambling may push you to make mistakes. If you make such mistakes once, you are more likely to repeat them again. That is why this is dangerous. I don't think I know people who manage to stay disciplined forever. Either they quit fully or they don't want to admit the real amount of money that they lost in their life.
Both of you maybe right but not completely, it is very possible to gamble for a very long time and be safe, it all depends on the person involved or playing the game, one golden rule to ensure safe gambling practice is to have something else doing, something tangible that is bringing in good money to ensure that when one gambles, their main purpose is simply to have fun and not to chase after money.
So lets not say that motive or reason behind our gambling activities tells alot about whether gambling will be safe on us or dangerous, someone who gambles occasionally and for the sole purpose of simply having fun should be good, doesn't matter how long they have been gambling.