I’m sorry you have no case. That is you have failed to prove that it is counter productive. That is not the opposite of productive. You are asserting that it is in fact harmful. Which you have not proven. The fact that these movies are not being made is this particular jurisdiction does not mean they are not being made at all. In fact they probably are, ten feet over the jurisdictional line. That line is not the state line it is the county line. So no, there is no evidence that this in any way harms the industry in California and therefore isn’t a valid argument against local regulation. There is no reason to suppose or believe the industry (have to call it something I suppose) is better off concentrated in one county vs across other counties in the state. You could argue that the law was not terribly productive but not counter productive.