You're missing a necessary assumption #3 - 'The pilot needs to be competent at correctly identifying and safely flying the aircraft in any mixture of automation

You're missing a necessary assumption #3 - 'The pilot needs to be competent at correctly identifying and safely flying the aircraft in any mixture of automation and manual control.' This accident was caused by a violation of #3. I've no doubt that the pilots in question were completely capable of performing these maneuvers manually - they failed at identifying which particular mixture of automation and manual control they were in, and in taking the correct steps during them.