I think pg is educated, at least the broad outline, of the age-old controversies in this topic and I'm grateful as a reader that he spares me the details and assumes some preliminary context.
His style of pop philosophy is useful in startups because it does not require context. It is ungrounded in actual philosophy, and would struggle to find an audience outside of this group.
But it is not straightforward to me. Or, in my impression, most philosophers. I'm reluctant to agree that aliens will assign any importance or even understand concepts like geometry or calculus. So to me, it is not preliminary context but it is a critical part of the discussion.