Fully vaccinated folks are substantially less likely to get infected and therefore less likely to spread the virus.
But, as Frank, Tyrone, and Chris have repeatedly emphasized, the key metric is hospitalization and ER visits. The capacity to treat infected folks in the hospital is finite (above and beyond every other medical emergency).
Only a very small % of fully vaccinated folks, infected with COVID, are being hospitalized.
Now, as the Headmaster of your demanding "home school" curriculum, can you muster up the rationale as to why it would be better if hospitals are not overrun with COVID cases?
Link: https://forum.uhnd.com/forum/index.php?action=display&forumid=2&msgid=47370