Such as, in a democratic republic, for instance, the United States, is it somehow wrong to listen to the will of the people?
In a large, diverse nation, again, such as the United States, is one blanket law for everyone somehow superior to specialized laws, suited for the problems of states or localities?
In the last several years, Federalism has slowly been tossed on the ash heap of history. Pity, because it is such a good idea. Moreover, it worked.