Yeah if you are a wise person, then you can get a positive lesson from gambling. Although gambling is a negative work, but if you have long been in gambling, I'm sure you can get a good lesson to apply in your life. A small example is greed.
Getting lost in a row for the first time in a row is enough for someone to quit gambling I think, but just like what you have said, if you are a narrow minded person, then you will never learn your lesson because you are only listening to yourself, you are not focusing on what is happening to you, your mindset is just on winning gambling, and not even thinking about what is going to happen to you in the future if you are going to continue losing in gambling.
This is all about making decisions---tough one, because it is for yourself, if you really want to earn some money. then look on the other sides, gambling is not the only way, there is plenty of ways out there where you could earn bitcoin in a very safe way.