Have you heard of "three-parent babies" that the flat-Earth fundamentalists think is heretical and may portend the irreversible demise of the species?
Some disease processes like some diabetes, heart, and liver problems are associated with bad mitochondrial DNA. During traditional IVF procedures, it's possible to introduce the healthy mitochondria of a third party into the fertilized egg, thereby preventing that disease or disorder.
While I think it's wrong to create designer babies, though I don't want laws preventing it, disease prevention at conception seems worthwhile.
On the other hand, I've always had the iconoclastic scientific belief that if it can be done, it should be done. Human cloning? Do it. Cross-species breeding? Who wouldn't want to see a half human half dolphin?
I am amused by the fact that the science is decades ahead of the law and my experimental curiosity outweighs my fear of the unknown.
I am 99% sure that all human/dolphin hybrids would look like this.