>I don't see why this is to be expected, but a business shouldn't expect to pay a fine
Understandable, you don't seem to know what zoning does so it might not be evident to you that commercial zoning is different from residential and available property uses are also different. Residential zoning restricts the occupancy and structures you can have on your property more so than commercial. That's why if you run a store in your house you will be fined unless you keep your customers and vendors under a very low limit and running a store from a commercial lot does not get you fined, for example.
Understandable, you don't seem to know what zoning does so it might not be evident to you that commercial zoning is different from residential and available property uses are also different. Residential zoning restricts the occupancy and structures you can have on your property more so than commercial. That's why if you run a store in your house you will be fined unless you keep your customers and vendors under a very low limit and running a store from a commercial lot does not get you fined, for example.