How Valuable Is an Expert Witness in the UAE for Project Disputes?

I was discussing a challenging project recently where technical and commercial issues became difficult to resolve, and someone suggested engaging an expert witness uae professional to provide an independent opinion. I have never been involved in that process myself, so I am curious whether an expert witness usually helps clarify the key issues and supports a fair resolution or if the outcome depends more on the quality of the project documentation and communication between the parties. I would really appreciate hearing real experiences and practical insights from those who have worked with an expert witness in the UAE.