“You are a butcher and that is all you’ll ever be”
That’s a pretty cheesy line, but what if we were to take it literally? Maybe it is inferring some kind of caste system in the outside world? The speaker even follows up with some line about rejecting his personality in the embryo.
That would give more depth to the parallel the show is trying to show with humans shackled with the same problems as the androids; destined to be stuck with their crappy station in life.