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I think this could be broken down further to mean:

People that create, rather than perform.

Zuckerberg made something brand new. The garbage man just does what he's told. There is a big difference.

There are many factors to success. And many ways to measure success.

So stuff means only startups and hacking here right? My dad took an exam in which people well above his age fail, but he passed and got selected in a prestigious government position. He then went on to work in a lot of departments of Indian government. In short he has done a lot of "stuff" stuff. But I don't see him being famous.

No. It's not a hard and fast rule of the world and the way it works. It's a good first-order approximation, and a necessary, but not sufficient condition.

Your dad may be famous amongst his peers.