Why not? Co-pilot is rejected by the hot stewardess for the umteenth time, he is really, really lonely, so he decides to go for the 72 dark eyed virgins.
Captain says, "No way, you raving lunatic!"
They wrestle with the controls...90 left turn, 360 right... co-pilot does a Split-S... 20,000 feet below captain tries to pull out.... wings rip off at 5+ G... "Fireball Seen".
I agree. I had a professor (engineering school) that had worked on fighter aircraft -structurally. I remember him saying a civilian jetliner would “come apart” in a powered steep dive between 700 and 800 mph. That the plane came apart doesn’t automatically mean it was a bomb.