Have a question that I cant work out.

Have been reading many books, literally hundreds of 'abduction' accounts.

99 percent of them all say the same thing.

'Greys' harvesting sperm/eggs, etc Implanting embryos, removing fetus's etc.

Now, if these 'aliens' have such an advanced intelligence and almost 'magical' technology, then surely they have zero need to 'breed' aliens and humans together.

I would imagine they would already have technology and knowledge to master DNA on every level.

Why the long road of 50 plus years of 'breeding'.?