Guppy, what you've said is all absolutely true, but the reality is that if both pilots were totally incapacitated (Dead), if someone reasonably intelligent but knowing nothing about aeroplanes was in the cockpit and able to communicate on the radio, they should be able to follow instructions and set up for a fully automatic approach and landing......ASSUMING NOTHING WENT WRONG ! (Which in my experience is normal - I've only had to abandon two auto-lands out of hundreds due to technical problems).
However, if things DO go wrong.....................!!!!!!