Funny, a recent study of lesbian family studies just found them to be extremely biased and fraught with unscientific methods. Yet they are knowingly used in court cases right now.
This at the expense of children.
Would that change decades of clinical experience and research showing the relationship between parent and child is more important than any other variable including biology?
Your desire to dehumanize gay people doesn't change the fact all humans qualify for all human rights by virtue of being human, no matter how you choose to dehumanize them in your world.