Because that isn't how the term "morality" is typically used by humans. The "morality police" found in certain Islamic countries aren't life coaches. The Ten Commandments aren't conditional statements. ... Inherent to the concept of morality is the external imposition of values.

Morality is about all of these things. and more besides. Although "outer" morality as embodied in moral codes and moral exemplars is definitely important, if there were no inner values for humans to care about in the first place, no one would be going around and imposing them on others, or even debating them in any way.

And it is a fact about the world that most basic moral values are shared among human societies. Morality may or may not be objective, but it is definitely intersubjective in a way that looks 'objective' to the casual observer.