Many people are actively hoping for some disastrous outcome like the one for phen/fen in the 90s. The pent-up desire to say "I told you so" is depressing.

Scott Alexander has noted that there absolutely will be a backlash, because there *always* is. Some new drug has good results, people claim it cures everything; it doesn't cure everything, the media summarize that as "Drug is Huge Failure." Eventually it all balances out.