From personal experience, gambling both saves and kills. The fact that it saves explains why most gamblers cannot stop gambling. They believe they will win again, so they do not give up. However, it is not reasonable to rely on gambling for survival because it is unpredictable, whereas a source of income should be stable and guaranteed.
This is significant because it is easier to plan with a consistent and guaranteed income than it is for gambling. Many plans cannot be implemented if they are based on gambling.
I'm thinking how gambling can save you. I mean we know that you can lose money in gambling so quickly depending on how much you're betting. That might be the "killer", but how can it be a "saver". Maybe if you won the lottery? Or if you won a huge amount in your bet that it changed your life? Is that what you mean?.
Anyway, we've said it numerous times already that gambling is a way for us to entertained and not a way for us to make money nor an income source because it isn't stable to begin with. In gambling, you will rely mostly on luck, and you're not lucky all the time, so how can it be a reliable income source.
Mindset matters. If you will look at gambling as a way to be entertained, losing a few bucks would be fine and you will not chase those losses. Now if you're seeing it as a way to make money, and you're not ready to lose money then there's a high chance that you will lose even more.