This incident was not caused by the failure of an engine to quit. Indeed, the unfolding history of aviation has consistently underlined that engines quitting is a far greater hazard than their not doing so.
Sure, that is evident but 'unfolding history of aviation' includes incidents long before anyone would have given a moment's consideration to an engine management system that could stay locked and uncontrollable from the cockpit. There has to be some means of stopping an engine -- in extremis -- by fuel cut-off. I totally disagree with your risk assessment of 'greater hazard'. How would you land a twin-engined big jet with one power unit locked at full thrust and the other dead?
Fair point about another thread to discuss this issue, though.