This does not explain the need for the ordinance. It explains the desire for authority. And I can’t help but wondering just who needs protection from a storefront sign.
Suppose the city passed an ordinance preventing people from wearing yellow shoes. Now imagine a mayor saying “The reason for the ordinance is to have the authority to enforce the yellow shoes ordinance on those folks who continue to wear yellow shoes. Meanwhile, we need to protect those who are wearing shoes of other colors. We need to remember that this situation came about because some people were wearing properly colored shoes while others were wearing yellow shoes.”