I cede the floor to Mr Wainscotting
… on the matter of the laughably predictable response by the Beat Your Kids To Prove Your Authoritah Kiwi Party to Adoption Action’s campaign to drag our adoption laws kicking and screaming into the 21st century. (And props to Jacinda Ardern for taking up the cause.)
There is no evidence to show that children require two (2.00) parents and one must have a diddle and the other a fanny. Sure, there’s evidence that children do better with two (as opposed to one or none) committed parents in a stable relationship, but there is not a shred that suggests that the gender or sex of the parents is of fundamental importance, and there’s certainly not the tiniest scrap of evidence to suggest that children do any worse when raised by same-sex parents.
Let’s put it this way: on one side George Takei; on the other, this dude.
Yep, I know who I’d trust my [hypothetical] kids with.
(BTW, Larry, you’re probably the last fucking person on this planet who should try to pull the “logic/ideology” dichotomy.)
Ideologically Impure 
but there is not a shred that suggests that the gender or sex of the parents is of fundamental importance
Well, there is some evidence that the children of two women do better, but I’m not sure how well that study was controlled!
You’re absolutely right, studies do show that children raised by two women have better outcomes across almost all metrics than those raised by ‘straight’ parents. I haven’t read the original papers yet (I’m working on a blog post presenting the evidence in favour of same-sex adoption), but the meta-studies consistently uphold the results, so the methodology is probably very good.
Sadly one’s immediate assumption is that a lot of it could come down to our shitty society pushing women towards being “better parents” (i.e. more “nurturing”, “in touch with emotions”, putting others before themselves).