Re: "If it appeared on screen, it's canon." THIS is canon?!?
Well the turbolift shaft might have been out of commission in TFF, and even if it was in use it doesn't mean there would always be a car in the shaft.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.