As a not-lawyer, non expert, I welcome this ruling. The strongest argument I can make in favor of this come from the dissenting opinion by Justice Kagan:
> This Court has long understood Chevron deference to reflect what Congress would want, and so to be rooted in a presumption of legislative intent. Congress knows that it does not—in fact cannot—write perfectly complete regulatory statutes...
> 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...
In other words, Congress can not get its shit together, but someone still has to do the work of figuring out what rules we should all follow. Congress would much rather play politics and make speeches and theatrical high-drama hearing rather than doing the hard work of legislating laws.
It is obvious that Congress can not get all the details right. Neither can the regulatory body. The only advantage of delegating the work of rule-making to regulators is that the iteration times are faster.
Why are the iteration times faster? It has more to do with the Congress being a dysfunctional body.
When incompetence is rewarded by reduced work loads, incompetence is amplified.
Yes Congress can not get their shit together. But that’s way more visible to voters when their incompetence translates to visible inaction.
This is the way the system should work (in my opinion). Feels like a positive ruling to me.