Are we in such short supply of human beings that this is necessary?
Cannon fodder comes to mind.
We are in very short supply of humans who believe their only purpose in life is to serve the powerful and do not realize they are free agents.
However, if you raise something straight from the embryonic stage and teach it that is all it’s good for, it will never leave your side and it will never complain about mistreatment.
The fact that you’d only have to feed it and clothe it makes it a relative bargain.