i believe its very easy for the GB or anyone of the upper echilon to rationalize and justify using psychologists or consultants to assist in phasing in change.
The GB can easily dismiss away any issues under the premise "if its good for the organization, then its what Jehovah wants"
For a long time I would not believe this. But the reality is, the way these changes are phased in, the virtual "cat and mouse" between new light in response to factual evidence, the intelligence behind the wording, the cushioning of the psycholigical impact, etc of new light is far more advanced than the minds of any GB member could ever dream up.
the GB are looking for a "response" to the current needs of the Org. No matter what that response is, "if its good for the Org, then it must be the right thing to do"