Lyman, if you were in charge of the AF safety program, and AF447 had not yet happened, what would your basis be for grounding the entire fleet of A330 aircraft until the pitot probes were changed out? You have perhaps 30 examples of pilots coping successfully with frozen pitots. How do you justify your position to management? How do you justify an expansion of the pilot training program to include relatively rare failures at altitude (where there should be plenty of time for corrective action by the crew.)
As I implied earlier, the legal profession tort process makes its living from peoples' inability to exercise perfect foresight.
It is relatively trivial to exercise perfect hindsight.
