My "healthy" approach to gambling, be it slots (infrequently), table games, or betting on sports is this: I play with only money I can afford to lose.
I see it no differently than money spent on a nice dinner, show, or entertainment activity. If I win, terrific! If not, I haven't changed my financial standing any more than if I had bought a burger and beers.
I think most gamblers fall into that category. It's simply entertainment or a hobby.
That's absolutely the right outlook, in my opinion. The losses comprise the cost of the entertainment, and wins can be seen as bonuses. Plenty of customers come in with a beer or a glass of wine after dinner and spend an hour or two zoning out and not needing to think whilst playing a few