Considering the sars-1 and mers vaccine attempts had over-stimulated immune response problems, it absolutely should be a concern. Vaccination induced immunity

Considering the sars-1 and mers vaccine attempts had over-stimulated immune response problems, it absolutely should be a concern. Vaccination induced immunity levels were sufficient, but now that natural immunity levels are higher, that's not good enough? Since I've been told over and over that the vaccine reduces the severity of breakthrough infections, shouldn't we also demand vaccinated people intentionally catch covid and quarantine, since that will also boost their immunity and prevent public spread? Where's the study that shows breakthrough cases are any greater of a risk than vaccine side-effects? And if the risks are comparable, why wouldn't it be reasonable to demand vaccinated individuals intentionally catch the virus to also boost their immunity?