.. My workplace does passwordless vnc too..
If there was a password, it woukd be post-it to the terminal where the session is displayed anyway, and the password popups would be somewhat of a disruption to normal use.
vnc is popular vecause it's easy to setup, mostly works, and no uberhumanky complex licensing that takes 6 manmonths to figure out and purchase, at which time the needs have changed.
First version was done with hdmi and sub repeateds, abd tons of cable..
Oh well, atleast it's all behind NAT