Sort of explained, in a nit-picky way. Yes, a franchise holder is allowed by Arizona law to forbid guns in his place of business, and that is as it should be. However, Arizona allows open or concealed carry, and I can’t agree that forbidding guns is “abiding by the laws” even if it is technically legal to do so.
Laws include property rights. (Not that that franchisee would get my business, of course.)