I feel we are talking about different things.

When you go to the doctor, do you come there and say, "I came here today because I want you to pescribe me medicine B". The doctor is the specialist, and the patient should share the symptons, and then, the doctor can find the right medicine for it.

If customers are the ones talking about solutions, and the Product Manager is taking notes and implementing. Well, that's no product management at all.

Until developers can understand which problems they solve, solutions will be sub-optimal.