Easy. It's a highly politicized thread, and in those sort of thread, driveby downvoting isnt uncommon, even on HN.
The conspiracy theory about the drug industry has been common forever, but it fits a more general pattern, like the Miracle Carburetor.
Obviously nobody can answer why something is downvoted, and discussing voting is discouraged, but personally, I'd like to see a controversial opinion that is original and interesting, not cliched.
Me, I wouldn't downvote something for only being wrong (IMO) or weird.
I have no idea about the amount that gets flagged, but I notice it quite a bit just by going to the front page and seeing something and if I happened to go back to it a minute later, poof, it's gone.
For calling HCQ a "$10 solution to a $10,000,000,000,000 problem". It's not.
We prescribe drugs everyday with a proper dosage on the bottle, and people handle it just fine. This is no different.
Either way, HCQ is widely available and inexpensive, zinc is widely available and inexpensive, and I believe that is the crux of the real issue. Even if it worked for a small percentage of people, it’s still a significant tool in the fight.
The problem is, there is a coordinated push towards expensive patented drugs and vaccines on the population, we are watching marketing, propaganda, and censorship at this point.
Can’t have a $10 solution to a $10,000,000,000,000 problem.