No tool is natural nor is any tool abundant in its infancy.

So neither of these should be used as reasons to ignore them. It is much better to figure out what the end consequences are if they do flourish and they map out the consequences of this happening. Then one can decide if a thing is moral or immoral based on what it's journey and destination require and the change to our society by using or denying it.

Also when I talk about clones as twins I'm taking particular aim at the sci fi meme that clones have a shared concious or telepathic ability. They do not, they are just the same DNA book read at different time periods to form a human who is an individual not a gestalt entity.