For me this falls in to the "understanding" category. The problem your trying to solve and what the client wants are often mixed up as the same thing - but they seldom are.

You shouldn't expect that the client will know what they want even if they ask for it. There is however always an underlying reason why they think they need it. Take the time to understand that rather than just more billable hours. It will be better for you and them in the long run.