I tend to agree with the observation you have made.
Practitioners are usually most effective at identifying and understanding the pragmatic risks.
The consultants I feel are there to cover/give an opinion in case things don’t work out.
But overall, I do think consultants can be beneficial in providing a good structure for the information/analyses done, and also a neutral third party to provide an objective summary of what practitioners with different views/perspectives, and interests, are saying.
