"Why would a track or casino be so powerful?"
Beats the %#$@! out of me, but they are. If you scroll down on Green Chip General, you'll see a thread between Bob L and me on the subject.
One example is past-posting. The casino decides when you can or can not place a bet. Maybe in some states this is spelled out by a gaming commission, I don't know. But in my state it varies from casino to casino. Yet, if you place a bet too late (eg. a "quadruple down") you can be arrested. In some states there are laws making past-posting a crime, but the actual crime is defined by the casinos, since they determine the deadline for when a bet is legal. There's simply case law that says casino rules have the force of law.
If you're new to blackjack, and truly didn't understand doubling down, you'd better hope the PC is in a good mood, or you could wind up in jail.
As far as that goes, gaming commissions are not generally elected bodies. Why can they make law?
I don't think any legislature passed law on the stutter cut, for which David Morse was convicted.