Who is disagreeing with this? The issue is that people disagree on what the facts are, so when twitter does a fact check some people would disagree, what if it's a close call?

I'm not going to agree or disagree with their assessment I don't really care. I'm saying I don't give a shit what "twitter corp" thinks about X persons tweet. I want to read it and see for myself.

Don't turn to Twitter for a medical issue... Who would do that? If you're looking in a textbook as mentioned you will find well referenced established science, or speaking to a medical professional. That is not Twitter and was never it's strength