Do not let anyone who delights in false humility and the worship of angels disqualify you. Such a person also goes into great detail about what they have seen; they are puffed up with idle notions by their unspiritual mind.
Colossians 2:18

Man and women produce children in the physical.
Man and woman also bring forth falsities and truths. Man can embrace the theory of evolution (a lie from men), and marry it making it their wife - their truth.

Choosing to believe that the daughters of men and Sons of God were fallen angels and such takes us straight into Jewish mysticism and angel worship. What comes out of the mouth defiles a man...