If you think organ farms have no historical or contemporary basis, you're sheltered.

We don't know the ethical ramifications of creating para human farms, but we have explored the philosophical ramifications in scifi. And it's never good. Any thought experiment with this basis ends badly for everyone.

Hell I'm pretty sure if this tech ever becomes real, we won't use it. We'll just say we're using it and instead keep kidnapping children like the current organ farms do, but now with a technobabble plausible deniability.