The "hard problem" is subjective experience (https://en.wikipedia.org/wiki/Subjective_character_of_experi...), which is different. You can have different way of explaining it, and what GP is saying is a proto-illusionism, probably not as well thought as it could be, but philosophers wrote on this quite recently (the idea is from ~2010): https://www.deepdyve.com/lp/springer-journal/the-illusion-of...