Note the title: Things I learned. She's posting about her internship experience and the lessons she learned. She's not trying to give nuanced, universally applicable advice for how to become famous in every circumstance and industry.
She's talking about "fame" from a specific perspective -- that of a student who might be intimidated by the success of someone like Zuckerberg. She relates the example of Paul Butler and his "fame". It's clear he's not "famous" in the conventional sense, but that he simply created something that people in the industry liked enough to tweet and email around. She realizes that there may not be anything intrinsically different about the people who attract "fame", and that her having cut Zuckerberg in the lunch line makes him just another regular person who lines up for lunch and gets cut in line. The reason Zuck's famous is that he did something that people liked (and now he's arguably conventionally "famous" because peopled liked it at scale).
I found this to be a simple and useful reminder that our heroes are human too, and all of them got where they are by doing stuff.
There's an almost pathological compulsion here to analyze every word and sentence, hoping for some incisive way to show one's cleverness. I think that's missing the point.