The difference is mostly a result of perspective, that could be fixed. The PM has the use cases and product gestalt, if this was shared and made the environment

The difference is mostly a result of perspective, that could be fixed. The PM has the use cases and product gestalt, if this was shared and made the environment in which the devs work, their prioritizing shifts to product, and engineering concerns would be limited to more obvious ones that make sense. But it’s human nature to protect one’s job and decision making autonomy. PMs being no exception, often underweight their roles in communication transfer and overweight them in decision taking.