Alternatively, this is just some guy asserting that everyone at McKinsey thinks they invented a brand new concept, when in fact, it’s just a heuristic they teach people to communicate more effectively, because communication is hard.
Edit: I cannot reply to the below, but I will say, that’s a pretty contrived justification for your view.
Communication is hard. Few things done at a corporate scale are easy to implement. People like to point at big consulting firms and say “I could have done that” or “they could have just asked me” but that’s really just a fraction of it.
Former employee of former McKinsey employees. Grandparent point stands: McKinsey seems to offer little to no value that isn't already known and easy to communicate.
I will say though that McKinsey alums I know seem to be better at playing corporate politics than the average, which can be a skill when married with technical acumen.