How does the "default" death answers that there is no afterlife? You need to be a believer in both cases. And then depending on the answer of this one, all of the others could also change.

Also, the very definition of God is that you can't see it, so negating its existence because our 5 senses can't get it isn't a default negation of the existence of God. To be a real skeptical you need to be doubt and understand both absolute answers.