For example. Not intended to be exhaustive.
It's still is an important insight though. The vaccines do not lead to herd immunity.
There isn't a viable herd immunity strategy yet, which implies very young, very old and immuno compromised individuals are still at risk.
It also means 'encouraging' people to take the vaccine won't help, except to keep those people out of the ICU, and if that's the intent it seems more 'freedomy' to me to just not treat unvaccinated covid patients when it peaks.
Because herd immunity is the argument used to defend mandatory vaccinations, and it appears to be a false argument.