I read articles about people leaving and of the ones that broke down the numbers, most people quitting were not nurses. Most articles omit the breakdown and try to find at least one nurse to play to people with your bias, but it's still usually <1% of total staff that choose to leave. Almost no one with medical education chose to leave because of COVID vaccine mandates. This is true if only because almost no one chose to leave healthcare over it.

Most hospitals expect all staff to be up to date on vaccinations and that now includes COVID. Vaccine requirements at hospitals are completely normal and good.