We don't really know yet if most of the hunters are just highly trained humans or something more. I'm happy Makima seems like a dangerous person because it would make sense for someone in her particular job, no matter if she was like that from the beginning or if she needed to become like that just to be able to keep going.
There was that line that others in the organisation would like to shut down the experimental unit, so likely most aren't willing to go as far as Makima. There's still a difference between using weapons and being a weapon. In our reality, for example, human soldiers being equipped with weapons, even remote controlled, versus an autonomous system independently going out and killing people, without relying on any human judgement beyond the initial programming. It's probably worse in this series' world because it would be like relying on the very enemies. The line might have been blurred, yes, but I get a feeling Makima is trying to blur it much more than anyone before her.