I think you should revisit the CDC stats on AIDS in the US and in the rest of Western society.

As for the kids, once they lose both parents, it's a difficult time for them, so the safety nets are important and better for family than strangers to raise them.  But those adoptive parents are not their parents, not their mom and dad.  And that's a big deal as we know from the fact that orphaned kids always seek out their real parents.

I have adopted nieces/nephews, and I have nieces/nephews born to my sisters/brothers.  I have different connections with the adoptive ones from the others; they're not my blood, and there's a lack of natural affinity between us.

As for homosexual parents; daughters need a mother.  And a father.  Sons need a father.  And a mother.  It makes a huge difference, and given that in all likelihood your child will not have same-sex attraction, that mom-dad relationship is all the more important.