They're not checking facts, they're just enforcing the mainstream view. The mainstream view is often correct, but sometimes it isn't, and then the fact-checkers are just horribly wrong, and suppressing actual debate on the merits of an issue.
https://en.wikipedia.org/wiki/COVID-19_lab_leak_theory
“Some scientists agree that the possibility of a lab leak should be examined as part of the ongoing investigations into the origin of COVID-19, though they have expressed concerns about the risks of politicization.”
You argue that blocking debate is a righteous act because the theory's "very existence harms public health". I'd counter that the gagging of a concerned public breeds distrust that is vastly more harmful than allowing debate would have been.
Listen to yourself. You are allowing MSM to manipulate the meaning of things in your mind.
You literally just suggested that fact checking in general is bad and should go away. I know you think that everyone is operating under the context of malicious/false fact checking, but that is my point: you all have undergone a paradigm shift in which you allow the meaning of words to change based on false flags and what mentally ill people are claiming is "fact checking".
Stop.
Everyone should be learning critical thinking and fact checking. Uneducated and vulnerable people need to understand this and see the difference between someone else doing it for them, and they themselves being able to see clearly what is happening to their lives.