Doctors in Star Trek: Non-benevolent and inhumane alien medics.

Doctors in Star Trek's Federation are invariably depicted as benign and adherent to the ethical tenets that we are all so accustomed to. This does not appear to be the case in alien/other doctors where the narrative changes, such that these alien medics are not bound by the moral strictures to which human doctors are expected to adhere. It is difficult to ascertain why this should be but it may be part of the episode creators' attempts to impute and reinforce inhumanity and alienness in other non-human species.