Most people that think of success with gambling or betting are just fooling. They will only know they are foolish after they have lost huge amount of money while some will become addicts and later know that they are stupid. Gamblers should always know that they can not succeed in gambling but be using small amount of money to gamble. But out of millions of people, the gambler can be lucky but a luck he should never think of but come unexpectedly.
You might have a point that you are making but it is harsh to call gamblers foolish and stupid. You could have found a more subtle means to relate your disapproval of gambling, an irony of the signature you are wearing.
Everyone have a chance to make their mistake and some have made mistake that later turned into success because I have also seen huge winners in this gambling business and there are people still earning with gambling. Of course I don't believe gambling will favour everyone because our luck has areas where it can shine and it is our duty to know what works for us and what doesn't so we can determine to stop trying or continue trying. Casinos and gambling owners never force any gambler to play and that is why we need to play just as we can without regrets.