It suggests a system design philosophy problem. A system that continuously goes into a erroneous state instead of a safe state (turn off automatically and rely

It suggests a system design philosophy problem. A system that continuously goes into a erroneous state instead of a safe state (turn off automatically and rely on manual trim) is designed badly. It couldn't be designed better, because cooperate added the requirement to remain within the flight model of the 737 at all cost. Nobody is blaming the engineers for this. But it is, by design, a bad system, that can by attrition defeat human decisions.