It's incredible, reading the dissenting opinion, how it's all really right there, perfectly spelled out:
"Congress knows that it does not — in fact cannot — write perfectly complete regulatory statutes," she wrote. "It knows that those statutes will inevitably contain ambiguities that some other actor will have to resolve, and gaps that some other actor will have to fill. And it would usually prefer that actor to be the responsible agency, not a court."

That's right, you dumb bitch. So DON'T write them in the first place.