@quixoticgeek I recall as a child watching american movies, and when someone wanted to flee a room because of whatever danger was there, they'd run to the door and then perform this inexplicable ritual of doing essentially nothing much with that doorknob except for screaming, banging the door, and some trying to shake the doorknob.
A closed door with a doorknob is not very cineastic at all! With a proper handle, it's very clear when a door is locked: the lever is down, lots of pulling or pushing force is applied, and yet the darn thing won't open.
A handle is also easy to change from "everyone can use it" to "children can't use it" - just loosen the lock-screw, make the handle point up vertically, tighten the lock-screw and voilá, small children (and uninspired people) are forever flummoxed.
The doorknob has one big advantage for Canadians. Just like elderly people with arthritis, bears cannot operate them. https://www.economist.com/the-americas/2014/04/19/knobless-oblige