I don't get why movie theaters don't diversify.

I understand they pretty much only make profit off of the concession stand because studios rob all the ticket sale profit.

But the chain theaters especially could "easily" offer other options.

Basically turn the theater building into a mini mall:

build a restaurant that serves good food (not talking about dinner and show type restaurant although maybe offer that too)

have a gift shop (especially for the kid movies).

Take some of the massive amount of parking most of them have and turn it into a park/playground.

Hell even a small arcade.

Just other things to attract customers/offer other profit opportunities.