I think a Mexican restaurant that has to comply with a raft full of regulations about grill temperature, cooler temperature, counter time, disinfectants, labor

I think a Mexican restaurant that has to comply with a raft full of regulations about grill temperature, cooler temperature, counter time, disinfectants, labor practices, business licensing and taxes, etc. can rightfully complain about a taco truck that shows up with no license, no inspections, no license plate, and underage employees serving beer. Of course, sometimes the incumbents spend many years constructing regulation after regulation to build a moat. Then somebody comes along with the funding to defy all those regulations. And the incumbent complains that the newcomer is ruining the moat. Sometimes it takes a good deal of wisdom and discernment to decide which rules are moats and which are legit. Then it takes character to tear down what should be torn down and defend what should be defended.