“Who knows anything” sounds dangerously close to nihilism

https://en.wikipedia.org/wiki/Nihilism

The problem is nihilists never produce anything of lasting value. Or of any value. It seems to be the posture of those who feel like failures, and justify that perceived failure to themselves by telling themselves that nothing is worth anything.

Perhaps others hold that position too. It seems like a dead end in a lot of ways...

A lot of Nihlism is about recognizing that even if everything is without intrinsic meaning and arbitrary subjectivity, that you can assert yourself to a meaningful life in spite of it all. I find that a compelling argument personally.

Sounds exhausting.