There are exactly zero good product/project managers out there. There are some really nice and good and capable and kind and talented people who have this label attached to them. There are some good product/project clerks. There are some good product/project directors. There are some good product/project evangelists. But no good product/project manager. The term is a pariah on the well being of teams and productivity and delivering the right product to the right people. Many peers have been placed in this position over the years, in every case, they've become less likable people because of it and we're no longer a net positive collaboration. In every case, they themselves were less happy and felt less about themselves over time.
Maybe some of you have experienced a good product/project manager (who wasn't really just masquerading as some other responsibility), but I stand by my assertion. My sampling of this "position" remains at zero good ones.