In exactly the same way a heroin dealer provides leisure and entertainment. Selling access to an inherently addictive substance should not be a for profit endeavor. The incentives are inherently biased towards harming people for profit.
> I encourage you to walk through some casinos and take stock of what you see.
I have spent a lot of time at casinos with family members who love eating, drinking, smoking, and gambling. Know what I've seen? I've seen that gambling is the only one of the four that hasn't killed at least one of my family members.