Are you deliberately trying to misunderstand my posts?
No, in fact trying very hard to understand them.
Most people spend a certain amount of time looking after the children of siblings or close friends. What I am saying is unsubstantiated, unsupported pseudoscience is the claim that childless homosexuals spend more time doing this than anybody else does.
That is simply not the case, they could even spend less time than childless heterosexual couples doing this and it still might have an impact since it is probable that there are going to be more childless gays than hets.
In fact they could show no interest at all in child rearing and there could still be an impact since they could be fulfilling subsistence roles leaving more time for the actual parents to perform carer activities.
I never said they didn't. In fact, I explicitly stated that they DID. That's why they try to adopt, in those countries where it is legal for them to do so.
So it is quite plausible that in a neolithic culture where there is no adoption agencies the same nurturing instinct could motivate them to care for siblings.
I see *NO* essential difference between behaviour in heterosexual couples and gay couples apart from that gay couples can't produce their own offspring.
And as I have already pointed out, childless heterosexuals often spend time helping to rear siblings, even in this nuclear family age.
So you would have to agree that a childless gay is at least as motivated to do this as a childless het.
It is the people who are proposing these ludicrous pseudoscientific theories that need there to be a difference. They need gay couples to be happy to devote their time to raising other people's children INSTEAD OF WANTING THEIR OWN.
No, as I pointed out it only requires that they show at least as much interest as hets in this. The point is that your average neolithic gay is more likely to be childless than your average neolithic het, so you don't have people with more interest, you just have a greater number with the same interest.
On the other hand
your ludicrous pseudo-scientific theory requires childless gays to
show no interest at all in lending a hand to siblings with children, or even to contribute in ways that would take the pressure off them.
That is utterly improbable, so your ludicrous pseudo-scientific theory requires we believe something that is patently not true.