This sucks. This is leaning further into the Major Questions Doctrine that SCOTUS has been pushing, where agencies and their actually knowledgeable, employed scientists and technical experts, have no real control over regulatory policies, and instead are beholden to Congress and judges to decide e.g. how many ppm of a chemical is safe for people to drink.
It is extremely kind of you to take the time to explain since our media can’t seem to be bothered to.