Your analogy would be valid if somebody was reacting to street racing deaths (human behavior) by shouting for speed governors that prevented speeds above the speed limit, tiny gas tank sizes (to require more frequent fuel stops), and convoluted electronic interlocks that had to be painstakingly disabled every time you wanted to use the full performance of a "unregulated racing car" (aka, anything more powerful and sporty than a Nissan Leaf).
There absolutely have been deep investigations of defective and faulty firearm designs. Look at the investigation that was done following the disastrous budget-oriented changes to the M-16 technical data package after the DoD adopted the initial Eugene Stoner design from Armalite (later Colt). The M1911, Browning's masterpiece, was almost entirely a response to the performance and technical failures of existing US Army handguns in the Philippines against the Islamic Moros. The list goes on.
Firearms designers have been very rapid to iterate on failures that are legitimately because of design or technical flaws. They'll even incorporate human factor issues in the designs. But they have absolutely no obligation to purposefully hobble and mangle a sound design based on logical fallacies that claim the changes will somehow (we're not sure how) reduce human negligence.