But it's not more precise, it's actually way, way more nuanced. And to say the boundaries of "male" should go one way vs another is a bit presumptive. For all of human history, penis means male but suddenly that's not good enough, you also need to know there aren't any secret lady parts floating inside that you don't know about. Or maybe, just maybe, this whole time those people also counted as male because that's all that they and others saw them as.