This is just what goes on in medicine science when things are operating properly. Test, collect data, run experiments, do it again, do it again, then, after the short term use has been proven safe 30 different times, by 100’s of research groups, you start researching the long term affects of it.
Listen, all I am saying is that if all the billionaires disappeared over night, if you avoided mass communication media you would probably not know. If you took that same amount of collective wealth from the bottom up human society would collapse.