The main issue apart from the "Consulting Industry" is that too many people try to follow a methodology to the letter, but superficially, without trying to understand the point and deeper meaning.
That's why people argue about rule or whether this or that can or cannot be done instead of trying to understand the aim first and then the cost/benefit balance.
Which is a problem when you see something that seems like it should help so you hire a consultant who can push the letter of the rules but doesn't understand it well enough to figure out how it should work in your organization.
I wasted a lot of time trying to get acceptance tests in here, they seem like a good idea but I can't get traction on them and the consultants preached the rules not how or why so the rules got roboticly followed with no helpful results. I'm still not sure if the concept is flawed or not just the execution but we threw it out.
That's why people argue about rule or whether this or that can or cannot be done instead of trying to understand the aim first and then the cost/benefit balance.