The Importance of Prescriptive Approaches to Training

It seems like a tough task to go into some place and be like, hey, the way you're doing things is it's okay, but our way is like super awesome. But that's never like super welcome to hear that you're doing stuff wrong. And there's this better smarter way because these other people are smarter and better than you. Like how does that goes with consultants and consultancies that operate in that way?