Who gets to decide if I self sacrifice?

The other problem here is that it is questionable whether or not vaccinating yourself helps others. There was a study that found that the amount of virus in nasal swabs of a vaccinated individuals was the same as in unvaccinated individuals. In other words, getting vaccinated does not necessarily stop you from being a carrier. I believe this was the reason for the renewed mask recommendations for those indoors even if you have been vaccinated (ironic since masks don't really work...at least not the ones people commonly use).

Yes, there are shortcoming to the voluntaryist approach. I don't think anyone claims otherwise. The claim is that there are fewer shortcomings than with any other approach.