It's actually constitutionally entirely reasonable to demand that lawmakers are the people who make law, because there's no specific reason to assume that the volume of laws should naturally drown the people responsible for them. But even if you do assume that, nothing in this judgement would restrict the volume of laws passed in any way. It's just not about that at all.
It all comes down to centralization vs decentralization. In a completely decentralized system you will never have an amazing outcome, because there will always be plenty of people doing stupid things - this includes judges. Yet you will also never have a horrible system, for basically the same reason - there will always be plenty of people doing 'smart' things. By contrast, centralized systems can yield a complete utopia under the oversight of socially motivated, intelligent, and highly capable leadership. Yet they can also yield the most unimaginably horrific dystopias under self centered, foolish, and incapable leadership.
So which does one prefer? In the end I suspect this is one of those issues where we all think other people think the same, but they most certainly do not. I personally could not imagine anything other than a system decentralized, to its greatest extremes, in every way imaginable. Because if I look at the political types of modern times "socially motivated, intelligent, and highly capable" are not generally the first words that come to mind.
I'm not going to get into debating this directly, but please be aware that arguments about the complexity of society are ideological in nature. It's not a simple factual matter on which there's widespread agreement. Many conservatives don't even agree with the premise that society has such a thing as complexity, or if it did that there's a higher level today than in the past.
It’s unworkable. And that is the goal.
How do you figure? This ruling says that Congress must be domain experts in every area, and agencies must merely implement the specific policies that Congress dictates.
Is that even possible? For anyone? Sure, Congress is dysfunctional but so what? This new regime is unworkable, and it doesn't matter if it's dysfunctional politicians or "top lawyers".