I don't see how discovering this was true or false has any bearing on the reality of it? Reminds me of that scientist that discovered that germs are cause of d

I don't see how discovering this was true or false has any bearing on the reality of it? Reminds me of that scientist that discovered that germs are cause of diseases and that doctors are spreading the germs with their bad hygiene. So doctors said "Well I know this theory isn't true, since I'm not responsible for all the manslaughter I'm committing according to this person. He is clearly insane.". And several decades later here we are.