I'd not go so broad as that, though I tend to agree. Bringing in outside consultation can help when the team is fractured, or when there's a disconnect between

I'd not go so broad as that, though I tend to agree. Bringing in outside consultation can help when the team is fractured, or when there's a disconnect between the team's needs and what management is willing to allow (that is, an outsider saying to management "Look, you've already agreed to be agile; that means you have to give the team autonomy to try this" can be more effective than the team saying "We want to try this"). But yes, there's a lot of snake oil salesmen, "Agile is good for what ails ya!"