Free software is like that sometimes.
Anything is like that. The inventors of a great many things weren’t good people. Just because people do great things, doesn’t mean they are great people. Nazi doctors found out a lot about the human body by torturing them and/or treating them inhumanely. Probably a lot was discovered during the torture of humans and ignoring human rights (which probably didn’t exist at that time).
Closed source software isn’t better. It’s run by people who devalue their workers, other humans, and in fact the entire world except people like them.
Nazi doctors found out a lot about the human body by torturing them and/or treating them inhumanely.
That is a myth. The documentation left behind by them had little to no scientific rigor, and basically nothing of value was gained from it. The situation was even worse on the Japanese side, where even the visiting nazis thought they were going too far and, again, nothing of value was gained.