So my interpretation of what you're saying is that a major cultural change has taken place in the airliner cockpit. It used to be controlled by the captain having the last word, but it seems he can't do that anymore?
The role of the captain has been reduced to 'chairman'? Ever mindful of the RHS presence as more of a regular source of irritation than a supportive resource.
I feel this question should lie with the training schools. I know little about how CRM is taught there but maybe they're the first place to look?