Yes, people have to work together and all roles have something important to contribute. I have been in plenty of situations where product managers and users tri

Yes, people have to work together and all roles have something important to contribute. I have been in plenty of situations where product managers and users tried to solve a problem and I could guide the discussion towards solutions that made sense development wise and also satisfied the users. Having customers or product people defining solutions alone is a surefire recipe for misdesigned systems.