I'm not a nihilist so I don't know whether those characterizations are accurate. It seems you are making some conflations with absurdism and pascal's wager.

Nihilism to me is about accepting the idea that there is no self but without actually having directly experienced that truth. And according to buddhism for instance, there is a way to experience a selfless existence which gives rise to true equanimity.

Without direct experience, nihilism is just another form of faith.