Lemain
I appreciate the sentiment. That said, just because you are highly experienced and respected doesn't mean you aren't capable of making a mistake.
One hopes that modern accident investigators have learned from the lessons of the past and don't approach an investigation with a conclusion in mind. In this case, the sheer volume of the report and the assistance sought from independent sources suggests that no stone has been left unturned in the search for a mechanical cause.
That just leaves human factors as a possibility and no doubt there will be much debate in the future about physiological, psychological and hidden medical conditions that can contribute to a complete disconnect between a person's perception and the reality of an emergency as it unfolds.