My job was to defend/protect corporate (agency) interests ~ their job was to tell me what the law was on a wide variety of matters.
I did my job. They did their job.
As consequence when you walk into a post office you know what to do next and pretty much understand the process through implicit cues so that little overt rule citing is needed.
You will also note that there are no electric cattle prods guiding you down a chute toward an open window ~ that's the part attributable to the lawyers. All the rest of it is attributable to my kind of folk (non-lawyers) ~ and we could have used those prods.
But if the lawyer had not prevented you from using the prods, then the agency could have been sued or prosecuted. Therefore, by informing you of the law, the lawyers were protecting the agency.
(leaving out the sovereign immunity aspect, of course)