The market efficiency it presumes is that an appeal to value is actually a rational actionable appeal to the government actor. That seems to be the whole point of the question (paraphrased) "can't you see the value of the thing we're losing" and speaking that to someone who stands to capture the value via tax receipts.
Of course if the government doesn't care at all about the 'market efficiency' of that value it's not clear why this question is even posed -- a hypothetically irrational rejection of the efficient projection of this value seems to be what the question contends with. The very question relies on a premise of someone somewhere acting with market efficiency on this data. With zero market 'efficiency' from the data, there's no useful market value generated whether you frame it as "capturable" or not.
> The market efficiency it presumes is that an appeal to value is actually a rational actionable appeal to the government actor. That seems to be the whole point of the question (paraphrased) "can't you see the value of the thing we're losing" and speaking that to someone who stands to capture the value via tax receipts.
Ah, no, but at least this puts our difference in stark relief. One can rationally appeal to government (as a democratic institution with a goal of furthering lofty ideals, like society and the economy in general) without necessarily appealing to government (as a selfish entity) desire to collect more tax receipts. If you must, think of it as appealing to individuals who may or may not support the government, and the government optimizing for that support rather than optimizing for mere tax dollars (which it can always print more of).