There are too many negative sides on gambling. Whether you obey or not, I don't think the good sides of gambling can overcome its negative sides. If you are addicted on gambling and somehow if you are not able to manage enough fund for gambling then you will become involved with many more bad things like stealing, snatching and so on. Again, you can get addicted to drag and alcohol too. These are harmful to you and your family.  I agree that there is some exception but I don’t think that, good sides of gambling can overcome its bad sides.