People in a coma are still considered real human beings. The reason why you'd pull the plug is because there is no prospect of survival, or that the resources necessary are too great. Which, as much as it sucks, is a normal thing that happens. People die.
Intentionally breeding people that have no intelligence is a very different thing and I don't even know why we're talking about it as if it's even remotely similar.
Of course they are very different things, I didn't mean to imply otherwise. I'm just drawing peoples attention to the parallels that do exist.
> The reason why you'd pull the plug is because there is no prospect of survival
Same goes for a body bred to have no brain, surely. Of course that moves the dilemma to "is it ethical to create humans with no possibility of survival", which is a different question equally worth debating.
Intentionally breeding people that have no intelligence is a very different thing and I don't even know why we're talking about it as if it's even remotely similar.