Probably because management can CYA by claiming to have done due diligence to their higher ups. "Well, we consulted McKinsey and took their advice, so if they g

Probably because management can CYA by claiming to have done due diligence to their higher ups. "Well, we consulted McKinsey and took their advice, so if they got it wrong, then the industry is getting it wrong." (These are the same guys that tell countries with successful agricultural sectors to embrace corporate farming. Cui bono?)