At one stating the earth revolved around the sun was a lie and dangerous to say, being met with persecution or exile.

There have been no shortage of "truths" throughout history which ended up being false. And people were persecuted for discussing such matters on a regular basis. Without open discussion, we cannot advance science. Without advancing science we aren't able to make any progress or discover anything else, including the truth. At one time, it was illegal to discuss a heliocentric model yet today this is common knowledge for 3rd graders. A lot of the covid info fit this model. If you didn't parrot what MSM was saying then you were wrong. Irrespective of reality-based information or logic. And a lot of this "truth" ended up being incorrect Discussion isn't dangerous. Censorship is. It is a hallmark of a closing society

Ivermectin has been prescribed to people for decades, now. "It (Ivermectin) was quickly discovered to be ideal in combating two of the world’s most devastating and disfiguring diseases which have plagued the world’s poor throughout the tropics for centuries. It is now being used free-of-charge as the sole tool in campaigns to eliminate both diseases globally. It has also been used to successfully overcome several other human diseases and new uses for it are continually being found. " "...widespread use in humans, a development which has led many to describe it as a “wonder” drug." People can chose what they want to do for themselves. Other research clearly showed what's often phrased as "observational promise" in regards to treating C19. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3043740/

Either way...since when did discussion become dangerous? That's the real problem Doesn't matter what subject we are talking about.