Wonderful comments. The only human viewpoint is to have respect for life just because it is life, and valuable because all lives are created by God in His image. Not because one might be another Einstein, Beethoven, or Mother Theresa, or create a miracle medicine. But just because each and every one is a child of the Supreme Lord and is therefore dear to Him, not matter what physical or mental capabilities or lack thereof. The lacks and flaws are only the in the vehicle part.
You and I differ a small bit - I see that every living being is a soul, underneath the physical covering. I don't restrict that respect for life solely to the human contingent. But human life does indeed have very special meaning, because we are given the depth of intelligence (and I don't mean IQ) to understand that God exists and we should serve Him with love. Animals can't understand that.
(Usually - remember Balaam's ass - who saw the angel before Balaam did!)
The slaughter of innocents before birth is a horrible crime that is causing more and more damage than most people even see.
No one's life is now worth anything.
"The lacks and flaws are only IN THE the vehicle part."
And I even proofread it.
Bedtime, I was up early!