I can believe that in either a real failure situation, or a power lever slide back, that a dodgy J hook would create an extra distraction.
Adding a slide back and a dodgy J hook together in the one scenario, whilst unlikely, should be easily overcome by just pushing the power lever back up and holding it there, climbing, then sorting the whole thing out. But once again, that's predicated on the person realising what has happened in the first place.
Holding, if newer pilots aren't aware of the J hook then the training for their rating, and their subsequent lack of revision about the aircraft, has been substandard.