Product managers's job is not to reduce work for developers (it could be a nice side effect), is to help avoid building unnecessary things and build the right t

Product managers's job is not to reduce work for developers (it could be a nice side effect), is to help avoid building unnecessary things and build the right things without waste as much as possible. PMs end up doing a lot of stuff that's not necessarily their job to keep the wheels turning, and it's the right attitude to a degree (sometimes it allows dangerous sloppiness to survive past its due date) but the job you have in mind should be performed by a good QA person.