As you understand and believe, my friend, gambling is nothing more than an entertainment activity, and that is the best perspective to bring in an activity that depends on luck. I can imagine how disappointed we are when we lose a lot of money that we earn from the hard work we do in life, so having a proper understanding of what your activities are actually doing is basic knowledge that a gambler must have, this is a risky activity and there is always no certainty in terms of victory, therefore all actions must be taken in a measured manner.
But some people have taken gambling to an unprecedented level thereby taking breathtaking decisions to gamble with all they have. I know and I agree with you when you said gambling is nothing more than an entertainment activity and I also have the same believe that gambling should be taken as a game of show and fun and nothing else. But that doesn't apply to all gamblers as some will take risks that are way beyond your comprehension. I don't support that kind of decision making because when it fails and the person loses, which is most likely to happen, it will end up consuming them health wise especially their psychological health. This is why I don't believe in gambling with all you have with the expectations of making unimaginable profits.