For the law to say that a dove-tail with Natural Law is mere coincidence, where the law stands alone, is the law saying too much. I see the law standing, indignant, arms crossed, chest puffed out, and saying "I hereby make it a crime to commit suicide and I hereby deem the penalty for a violation thereof to be death!" And there, over in the corner, is Natural Law, rolling it's eyes and saying "Yeah, sure, whatever."
I may have lost track of all my posts and I'm not inclined to go back and read them. However, I don't think I've ever disagreed with you about, or argued any issues regarding the fallibility of this or that law; it being a good or just or bad or unjust law. In fact, I started out trying to parse a distinction between a simple "law is law" argument and "law must be obeyed because it is the law" argument. I tried to figure out the former because I could not believe anyone would believe the latter, especially an American.
But okay, if all you are saying is "the law is the law" then I will stipulate that the law thinks so. Therefor, it is, at least as far as the law is concerned. On the other hand, if you are saying that the law should be obeyed simply because it is the law, I disagree. The law should only be obeyed because I think it should be obeyed, for whatever reason (expediency, don't want the stick, or I personally find it inherently just and in accord with Natural Law).
On that latter point, I think that law review article I cited makes some good points about how even our new and nuanced laws can be traced back to preexisting notions of justice. Thus, some regulation or policy articulated in the bowels of the CFR or FR about this or that which never existed in the world, prior to the development of this or that technology, still finds the genesis of it's result in Natural Law.
If there is a failure of our minds to meet, it could also be due to what I find to be a natural aversion to the way "Natural Law" is sometimes spun by those with whom I disagree. Like some "sovereign" nut in Idaho who thinks his understanding of God = Natural Law. In that case, I'm with you 100%. But I don't think Natural Law is so constrained. And even then, Natural Law, like the law law, often runs head on into conflict with human nature (Prohibition). One might argue that Prohibition found it's roots in Natural Law, but I disagree. For prohibitionists to wrap themselves in the flag of Natural Law is no more legitimate than it would be for Republicans to claim the flag as their own.