It's a little more complex than that "In thunderstorm accidents, the sequence usually starts with a loss of roll control. That is why keeping the wings as level as possible is primary. If roll control is lost, the natural tendency of the airplane is to enter a spiral dive where the airspeed increases rapidly and is soon outside the envelope. Then the airplane is in a condition where either turbulence or use of the controls can cause a structural failure."

In other words failure to respond correctly is the problem, not the airframe.