RebE, you can’t fully abandon caution. Oft-quoted vaccine efficiency is based on everything else being equal. If you previous did not spend long time in closed quarters with people, and now you do, then you did not decrease yours, and community’s, risk, you simply use vaccine to rescind restrictions. Still, do not spend prolonged time in unventilated closed spaces, esp with unvaccinated people. Furthermore, if you feel so negative towards them that you do not feel responsibility to protect them, then why bother spending time with them.
To push this logic further, does the LOR feel it is OK to have in his minyan people for whose health he does not want to be responsible? Would he daven for their health? or just sanity?