This actually made me curious.
The discussion prompt is that some people/scientists want to "degender or neutralize language". Morgan says that they're doing this by pretending that bioligy doesn't exist, and while agreeing Dawkins says that there are two sexes. Who are they talking about? Who says that?
Dawkins then says that it is bullying, and that we've seen Kathleen Stock and J.K. Rowling get bullied. What does that have to do with chromosomes or gametes? Take Kathleen Stock: she is, or at least was, a trustee of the LGB Alliance and she opposes banning of conversion therapy because she wants it used on trans people. What does that have to do with sex?
He then says that sex is biological, and that he doesn't want to talk about gender. However, they go straight to his old tweet about Rachel Dolezal, and where he says that some men identify as women, some women identify as men, and compares that with Dolezal. Do these trans people identify as having different chromosomes than they have in reality? If not, what on earth is he talking about?
None of these are rhetorical questions, I'm hoping for an answer because you found what he said obvious while I didn't see the relevance at all.