Wouldn't your suspicion that something is wrong with composite aero surfaces support the findings of the 587 investigation? The co-pilot overreacted to an upset and snapped the vertical stabilizer. You can snap the aluminum tail off of an airliner just as easily by exceeding design limits.
Yes, but "design limits" should include TO and landing, don't you think?
Flight 587 was doing about 240 knots when the tail came off. It should not be possible to kick the tail off an airplane of that category at that speed no matter how hard you try.