I find it interesting we are discussing a case where precedent was overturned, and you are suggesting precedent will fix something.
But laws can't do that in infinite detail. It's literally impossible. So it's not a straw man at all -- that was my point.
At some point, regulatory agencies, like anything in the executive branch, have to decide for themselves how to get their job done. Because they have to do that a million times every day.
If Congress didn't specify who will pay for the observers, it makes much more sense to leave it up to the agency than to the courts, except in cases of obvious abuse, corruption, etc. -- which this does not appear to be.
I agree it sucks that the fishing vessels have to pay for the observers, but it seems obvious to me that the body to fix that is Congress. If the fishing industry can't get the agency to change it, then they should be contacting their Congressional representatives to change it. And Congress either will or won't, but that's literally who is in charge of this.
It seems like a strange issue for the courts to get involved with, because there's no conflict with other laws or with the constitution.
The case before the court is a good example of how the opaque and unaccountable nature of a federal agency allows them to serve their own self-interest at the expense of the citizens they are supposed to protect. Specifically, Congress specified in law that "authorizes the government to require trained, professional observers on regulated fishing vessels". But their law did not specify who would pay for these observers. So under Chevron, the agency got to decide. And, shocker! They decided they did not have to pay for it.
This ruling stops that specific abuse, and hopefully many others. The actions of federal agencies is not generally a thing to be desired.