The greatest man ever born was Jesus Christ who was also God. He stated that “in the beginning God created man, male and female he created them”. this was his statement regarding whether a man could divorce his wife.
If Jesus in all his Divine Wisdom says there are two genders, that’s good enough for me. See: Matt. 19:4. God’s wisdom and creation ought to be the end of the dispute.
God's son you mean? Right?