In any situation with a broken status quo, openness by those that disagree will just get them squashed. In practice, change occurs in the dark: The people that have a different idea hide in a corner, bake the idea in secret, build allies in secret, and only reveal it when they cannot be squashed down. It works with different ways of investing, with tolerance to LGBT, interracial marriage... instant openness in an environment that is against you will ruin you unless you are powerful.
The principles, as applied, lead to an appearance of openness, where people have to toe the party line and only disagree when they know they can win politically. Otherwise, the powers that be will find you and make sure your disagreement can't go anywhere.
And how do you get power? In practice, by toeing the party line. Only by agreeing with the people above you, those that have been blessed as the smartest, you can get any credibility. And yes, this is something that is actively codified in Bridgewater's culture.
I wish external researchers had access to the internal ratings and surveys that Bridgewater employees fill in all the time. The patterns in them are the definition of a dystopia and groupthink.
You make some good points, and I especially like this one.
I get the feeling his wife never asked if she looked fat. Or he always made the mistake of saying yes. Talk about missing out on reality.