And how is that more or less likely then companies ignoring city zoning laws, or making cities grant zoning exceptions through kickbacks and corruption?
Much more likely! Zoning exceptions can be opposed and construction is very visible, as with this trend we're starting to see. Whereas once a structure is built the owner will stymie attempts at investigation by denying access, and generally has more resources than a municipality to waste endless time in court. If they're politically connected at the state/national level, they can even nullify existing pollution laws or override local ordinances.