The downvoters don't believe in vaccines.

the only people gullible enough to believe that are anti-vaxxers.

Have no interest in offspring, my own or anyone else's - thus why I have no spawn.
Rooting for an extinction event, but not through anti-vax. Too easy, and quickly contained. I'm STRONGLY FOR mandatory, universal vaccination, even for HPV and the like. And for active PrEP protocols, universally applied. Not a good fit for your narrative, then, obviously.

However...
We're absolutely HURTING for an extremely deadly pandemic, Thanos-style. Humanity urgently requires the ugliest sort of wake-up call. Our priorities as a species, a civilization, and a society, are increasingly countersurvival.
A hard kick in a tender place sorely needed.

That is such a genius idea!

They're the target. Why would anyone else even care? Everyone else believes in vaccines.