Your analogy to the Navy's Sea Dart is both incorrectly described, as well in appropriate to the aiming systems discussion.
First, the correction. Your "looks good on paper, passing all the development testing, but fails when placed into action in the real world" is INCORRECT. Yes, the Sea Dart passed all its development testing with flying colors -- and everyone was surprised how well it performed. But it NEVER SAW ACTION IN THE REAL WORLD in the first place, nevermind "failing" it.
The project was scrapped, because it offered a solution to a problem that DIDN'T EXIST. The Navy was worried about supersonic planes being able to take off and land on the decks of aircraft carriers, a worry of which was shortly thereafter completely blown away with the introduction of the steam-piston launch and stopping wires. I'm an ex-Navy man myself, and pride myself in my "military history buff" knowledge of these things.
But foregoing my "post-service military history buff" knowledge, did you even listen to the audio in the video, or did you even read the Wiki link? Or did you just skim it, thinking its full content was "Exhibit A" of the point you're trying to make?
You're supposedly a QA Tester, but you amaze me sometimes with your oversights, Greg.
-Sean