The question posed was why do they Have to? Not why Should they.

Of course we need people driven to move society forward. But there is a stigma in modern society it seems around people who are perfectly happy being who they are and not "striving to be great". And that's ridiculous.

The previous poster asks all his potential dates, with what seems to be a fairly heavy helping of disdain for the "wrong answer", what their plan to change the world is.

Why does it matter? You go change the world. Let your spouse or your friends or your colleagues be content with not changing the world and just be happy living in it.