The problem: nobody sees the lift until it fails
Lift incidents are usually discovered late. A passenger is trapped between floors and relies on an intercom that may not be answered. A door stalls repeatedly for weeks before anyone raises a complaint. A goods lift is overloaded every evening because it is quicker than making two trips. In each case the information existed on camera, but no one was watching, and the footage was only reviewed after something went badly wrong.
Manual controls do not close this gap. A maintenance visit sees the lift on one morning a month. A security guard watching a wall of screens cannot reliably notice a door that closed slightly too slowly. And in most buildings, the person accountable for lift safety — the facility manager or society committee — has no continuous view at all.