Another reason to favor nurture explanations is that nurture explanations carry less weight in an argument than nature explanations.

There's no arguing with nature, it's the ultimate citation.

But nurture means that you, or somebody involved, had a choice. So the buck stops at, rather than the faceless divinity of nature, a mere human. And those are much easier to dismiss.

So we paint the opposing argument as arising from nurture rather than nature. And those arguments stick around and get cited. And a "it's all nurture" model develops.