Mostly a movie trope now. Casinos are full of video cameras, and are owned by large corporations; they’re not going to want to pay a large legal settlement because you got beat up by a security guard. And, BTW, most large chain stores with security usually tell their loss prevention officers to not get physical with shoplifters for the same reason.

You’ll usually just get thrown out and banned for life from any of their properties.

When casinos were largely owned by organized crime? Probably pretty accurate, if you were lucky.