This was explained to me on an episode of LA LAW where a Jewish family was trying to suppress findings from Nazi experiments during the war used during the current research towards modern medicine...
It was something like "If we say that this is fine, that the ends justify the means, that just gives the next lot permission to use people like cattle to further their own understanding of science, because in retrospect they will be forgiven anything if their findings are useful, so they'll keep butchering and vivisecting until they get out of the red."
Helen Magnus in a flashback last week was threatened with jail time for stealing corpses, since at the time it was immoral and illegal for anyone to experiment on the dead.
It was something like "If we say that this is fine, that the ends justify the means, that just gives the next lot permission to use people like cattle to further their own understanding of science, because in retrospect they will be forgiven anything if their findings are useful, so they'll keep butchering and vivisecting until they get out of the red."
Helen Magnus in a flashback last week was threatened with jail time for stealing corpses, since at the time it was immoral and illegal for anyone to experiment on the dead.