Gambling has only become a non sense thing to you because you are not addicted, but try to gamble and be responsible for the 2nd time around and I am sure you will enjoy what you are doing. Just like you, I also made some mistakes in the past, I got addicted, but it doesn't make me stop, instead I learn and I can enjoy gambling now with proper control.
I think I would agree with this, everyone has different experience in gambling but if we look at in general sense, we can see that gambling is just a real form of entertainment with some risk on it, so it's up to us on how to we handle the risk that we will not be addicted or lose more than we can afford to lose.
I have been gambling and i am not winning most of the time but I can tell you that I am happy with what I am doing.
I have consider it as an entertainment, so its something I have to pay just to enjoy, winning is just a bonus.