He only said it was beyond our understanding "for some unknown amount of time", or that it might end up being too complicated/incompatible with our existence.

He only said it was beyond our understanding "for some unknown amount of time", or that it might end up being too complicated/incompatible with our existence. His comment wasn't at all about giving up, honestly the exact opposite. It was about avoiding/managing the disturbed/dreadful feelings that commonly accompany the thoughts and work in this domain.