Of all the destructive habits in the world, gambling would seem to be one of the more benign. It doesn't blow out your liver. It won’t make your nose cave in. Even after the most appalling run of bad luck, you can be reasonably sure that you won't be carted away, having expired with a mouth full of vomit. No harm done. It's only money.
You can keep telling yourself this until the moment you kick the chair out from under you.