The opinion is a very stereotyped one, that has been very widely expressed all my life and probably far longer.

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.