Also it's one thing to think that there are a small number of people who don't easily fit into binary sex categories because of DSDs, but it's quite another to then conclude that male and female have no meaning. Does he apply this logic to other conditions? Ironically, his relationship to reality sounds a bit... Trumpy.
I don't know where he got the idea that you don't need a man and a woman to create a baby - cloning? that recent gene editing experiment on mice that still required female mice for gestation and egg provision - but I would hazard a guess that it isn't going on in the Victoria Hospital maternity ward.
He claimed that gender identity is relevant to blood tests because of hormones, but hormones are just drugs/medication that can be taken for a variety of reasons, and there is no requirement for a trans person to take hormones.
He is either being dishonest or lacks basic deductive capacities.