promani
The relevance is in the notion that more people (professionals) present to provide input during any unexpcected or untoward event is clearly a good thing. That exact situation has, in several well-known incidents or accidents, proven to be a real lifesaver.
And your notion of the Captain's role is a tad out of step with current thinking and practice (the past 25 years or so) with regard to decision making and CRM.