Ok, this is really icky. I don't like this at all.
"In the depth of winter, I finally learned that within me there lay one invincible summer."
A Christian's life may be the only Bible some people ever read.
"The first time someone shows you who they are, believe them" Maya Angelou.
I like your Christ. I do not like your Christians. Your Christians are so unlike your Christ" Gandhi
I don't see anything problematic with the idea, so far... it's not as if the current goal is to create a human-cow hybrid with unprecedented milking potential... now that would be a curious thing to happen!
I don't see the big deal. We, as a species, over produce fertilisable material in the billions. Women lose eggs every month, and men billions of sperm. If it can be made useful for a few days and find a cure to large scale killers of adult humans, that for me far outweighs the harm of destroying pinhead sized clusters of cells that are no more capable of feeling pain or sentience than the hair we shave off, or the cells we destroy when we pierce an ear.
The key thing is controls. I'm pleased to say that the UK government is having a full scale vote about this in the Parliament, and that the Prime Minister has given permission for a free vote (ie, he won't ask his party members to back the party, they can vote with their underlying opinion).