Your not doing your own research. Your likley not capable of doing such research. Your doctor also isn’t doing their own research. Your doctor does take the knowledge and guidance from those that do research after they’ve done it and it’s be reviewed and validated by national healthcare standards agency.
Much like documentaries much of the available information online that’s accessible and engaging is just entertainment wrapped packaged like your learning something. Especially when your sources lead you to think herbal medicine is a better alternative.
Because there are so many small parts to a processor you need 99.99+% at most stages to stand any chance of mass production. In this context 60-70% is seriously impressive. Millions of things have to be done right to get this type of yield.