You are defying strict biology when you raise a kid that is not your own no matter who you are, it doesn’t help pass your genes. Anyone willing to do that is potentially pretty cool. I think women are less prejudiced against offspring not their own ,so two lesbians could be as good or better than anyone for adopting. Of course there are some bad apples everywhere.
I am going out on a limb here and say that the minds behind adoption law have figured out that the risk for children and correctly found it not to be higher with the groups you worry about compared to other actual applicants.
