The difference between entertainment and a casino game is that a casino game is designed to try and get you to put in more and more money, where most entertainment oriented games will have you pay once for the entire experience.

Of course the gap between these is closing by the introduction of lootboxes and similar mechanics. I do think these should be regulated as it aligns the incentives to get people addicted to your game, which is a fairly basic variation on preying on the vulnerable. In addition I -- and I assume most people -- do not like getting treated as a money piñata.