Adding in the overreach of the national government definitely adds another level of complexity.

You sort of have to think of "legal"/"illegal" as being who will try to prosecute you for stuff. When stuff's "legal" in a state, it means the state police and courts won't prosecute you over it.

Undisciplined

Yep! I forget that a lot. Something I still don't quite get, it's not about betting but about smoking weed. A friend of mine got banned from entering the US for two years because he admitted to smoking weed in a state where it's legal. They applied federal law in his case, and it was at the airport. Isn't that weird?