Thanos Thanos:
There probably has to be a major Four Horsemen of the Apocalypse type of catastrophe (world war, global pandemic, full-spectrum resource collapse, mega-death beyond all current imagination) that has to happen again before enough stupid people finally smarten up and start doing the right thing.
Hopefully if that happens it just eliminates the stupid ones and saves the sane part of the world from having to explain to these halfwits why vaccinations save lives.