The ultimate truth is that no product will never quite be right for everyone; it’s an ongoing process of continued development and iteration to make it better. The best product managers are the ones who simply roll up their sleeves and help their team through this journey.
More importantly, once shipped, the best product managers can measure whether the product shipped is the right one. They should work closely with the team to make sure the right moments in the product are measurable, and that the hard questions about whether people are really using the product can be answered. Once a product ships, they are reading through that data voraciously and helping the team figure out what parts are working and what parts are not, and together quickly coming up with a plan for improvement and more testing.