We as humans seem to have this unceasing tendency to essentialize -- to believe that everything we do comes from deep-seated psychological needs. We project every action onto some event from years past with a parent, a lover, a friend.
I feel like this is borne out of a desire to believe that behavior is deterministic. That if only we too had undergone the experiences of the person who we're reading about, we too would be that acclaimed sci-fi writer, or famous entrepreneur, or asshole president. It excuses, to some extent, the fact that we are not that person.
But sometimes that's not the case. Sometimes we just build shit for fun. It doesn't all have to be us coming to terms with our distant father.
Zuckerberg, of all people, once had a quote vis-a-vis The Social Network (can't seem to find it) that basically amounted to the idea that they had to make the entirety of Facebook be about his rejection by a girl because the idea of people building something cool for its own sake doesn't make a good movie.
What's interesting for me is I feel like this armchair psychologizing we all do is getting worse. I don't have any evidence to back this up, just a feeling -- as we're exposed to more people's behaviors, we fall back to essentialist attributions of that behavior more and more.