I'd argue that hospital computers shouldn't even have Bluetooth, but that aside, you can still achieve outgoing communication without allowing incoming communic

I'd argue that hospital computers shouldn't even have Bluetooth, but that aside, you can still achieve outgoing communication without allowing incoming communication. Yes, a hacker might break into an office, hold an employee at gun point and gain access to their account and then move laterally, but that's a very different threat model than "somebody ran an exploit scanner on the university's AS and encrypted our servers".