I saw you had been downvoted and I upvoted you, despite disagreeing very strongly with your opinion, because you stated your opinion without vitriol and while I might disagree I'll still fight for your right to say it as long you do so in a way that isn't hurtful.

I think the line of inquiry into replacement organs can be researched ethically but the how of the research may cross ethical lines if not done carefully. Given diseases we have, I think we need to do the research and find an ethical way to make this kind of organ production happen, if we want to extend human lifespan.