Chicago School jerks got their way in the '70s and we effectively decided to stop doing that. This was the first notable fruit yielded by the postwar pro-rich/business "think tank" and intellectualism-washing push which was quickly followed by that set dominating almost everything.

Good luck reversing that and bringing back the "giant enterprises may be assumed harmful" standard (the one under which it was possible to win these cases more than once in a blue moon, without unreasonable costs) now that rich right-wingers just openly steer most news media.