If you've followed Dawkins' trajectory, I don't think it's clear that he's "otherwise of sound mind" anymore.

He's had some very strange output on biological gender, where he tries to handwave away the existence of intersex people. And he's a biologist.

"Intersex" is a misleading umbrella term for a whole bunch of different DSDs, each of which is 100% specific to one biological sex. And I don't think I've ever seen the term "biological gender"; about the only thing gender proponents seem to agree on is that it's NOT biological.