I read someone saying "habit of gambling" come on man, what the hell is that? If you are treating gambling as an habit the only i can say is you are an addict gambler who only put a masquerade in front to not show what is the reality below the surface.
About the main of the topic, the best you can do is always avoid to bet on full luck things. And resposible exist but only a few people can do that.
You have a point but from my observation about the quote. I believe it's either the person is not a gambler or s/he is gambling-addicted because anything that's a habit is something the person can't skip every day, and when gambling is seen as an everyday thing, it is easy for the gamblers involved to lose the ability to control their buzz.
Having said that, there are games that involve luck, and any strategy uses a void, but the most important thing is understanding the game concept, never going beyond the limit, and there is no luck on the gambler's side early exit won't kill.
Usually it's more about how you control yourself and how you deal with controlling yourself, if you possess those qualification then the chance that it's going to be okay when dealing with gambling, more on setting limits and follow everything while you are still in session but the time you exceed chances to lose a lot once you lose control is not by far.
It's your time and your money that crucial once you got hook and if you don't have any discipline even how good your strategy once greed dominates you, there's always a big risk that possible to happen not just on your finances but also from your mental aspect.
But you will not came to that point if you didn't experience the worse since sometimes realization is great tool for people to do more better decision for next time around when you are gambling. That's why we see some gamblers who have great control since they already know what's going to happen if they exceed to what limits they set and could able to go out once everything falls apart on their side while playing.
Although many people is lacking with experience but I guess there's lots of means to know about the experience of people and if they digest well and have good self control then provably that they can escape those unwanted defeat and they can engage on more ideal gambling experience.