(At least some of) the agencies brought this on themselves with their abuse of the goodwill/benefit of the doubt previously afforded to them. Most flagrant has been the ATF, for one example constantly redefining machine guns or pistol braces, turning millions of citizens into felons with no oversight beyond drawn out and expensive court cases against them.
I never liked the smell of this power being afforded to agencies in the abstract, even for the "good guys" at the CDC or Department of the Interior. It's too rife for abuse. Federal regulations (whether you call it a law or a rule, the party van is coming if you break them) are supposed to be hard to pass. We once needed an amendment to ban alcohol before we forgot the definitions of interstate and commerce, but if my understanding is correct, under Chevron deference the DEA could have decided to schedule it without even asking congress.