I agree and I think it's true because of the way how working communities(i.e. a team, a company etc) are structured. Just think about how a hiring decision is

I agree and I think it's true because of the way how working communities(i.e. a team, a company etc) are structured. Just think about how a hiring decision is made in first place. Someone in a company needs something get done and they are going to do it with someone else's money. Their interests are structured in a way to produce KPI specific to their job and their risks are loss of reputation. It's extremely profitable(in a sense of career KPI) to get someone from outside get things done with the money of the company as long as the outsider transfers the success to you and assumes any blame for any failure. The only catch is, the consultant needs to have a track record that makes the successful outcome plausible at least on surface because the person who hired the consultant must be able to defend the hiring decision. You know the “Nobody ever gets fired for buying IBM”? It's the same idea. With a plausible hire, the success is owned by the person who managed the process and the failure is on the person or company that executed the task.