You could say that about literally any shady business. Imagine seeing a PDF proving tobacco leaders knew for decades that it caused cancer and saying what you did.
Being monetarily successful does not mean you’re good or shouldn’t be criticised.
If you think that this is an entirely artificial example, consider the fact that the same man designed the V-2 rockets which were hitting London during WWII, and the Saturn-5 rockets which brought astronauts to Moon: https://en.m.wikipedia.org/wiki/Wernher_von_Braun
I think the idea being debated here is that it’s impossible to know whether the business practices would work without the lack of ethics. It might not be a good case study or a direction you want people going in as it might put them in some of the ethically compromising positions, or even worse require people to put themselves in those positions to work
But I would be comfortable pushing back on the idea that we should structure and operate our medical clinics like theirs because they made scientific breakthroughs.
- The obvious take is, the evil deed's already been done, the knowledge it produced can save lives and can't realistically be re-gathered any other way, so why not use it?
- The counter to that is, using it legitimizes and encourages similar acts in the future.
(Personally, I can see the encouragement angle; disagree with legitimization.)
- There's often a side thread going on about how the atrocities and those who committed them were not Up To Scientific Standards, therefore all their data is invalid, so there's no reason to use it anyway.
(Personally, I think this is a lame cop-out, used when one feels the ethical argument is too weak to stand on its own.)