That is not exactly correct. While they don’t have to get planning approvals for example a new parking lot, these entities have lobbied and negotiated with county and city authorities for zoning regulations that allow them to develop as they see fit to a limit. These zoning regulations are not carte blanche to do whatever they want.No, it really is not. There are no planning reviews for attractions at Universal Orlando Resort because it is zoned as a planned development that effectively gives them control of their zoning. SeaWorld Orlando is similarly zoned. Many large housing developments also get such a zoning.
Disney does not have that limitation. If they wanted to change zoning regs to build a 100 story hotel, they could force it through. If USO wanted to do that, they’d be appearing before different public boards which they don’t control for years and years, with no outcome assured.