What makes you think productive work is what consulting companies are selling? They're there for laundering accountability. When you bring in consultants to roll out your corporate AI strategy, and it all falls apart in a few years, you can say, "we were following best practices, nobody could have anticipated X," where X is whatever failure mode ultimately tanks the AI strategy.

Consulting companies don't sell productive advice. They sell management insurance.

I think this is the kind of logic you wind up with when you start with the assumption that the Big 4 tell the truth about absolutely everything all the time