There are a lot of tasks like this that require a lot of attention but little action. Train conductors, pilots (after takeoff, before landing), navigating a ship or boat on autopilot, driving a "self-driving" car, watching automated processes, guarding Epstein's prison cell. Basically, you observe a process where nothing ever goes wrong, until something goes wrong. Some of these people take their job seriously, others watch youtube, surf the web, text, tweet, message, talk on the phone, even sleep. I'd bet this woman was distracted by one of those things.
Yep, the Air France A330 that plunged into the Atlantic several years ago showed exactly what can happen when the automation suddenly fails. The aircraft was still stable and flyable, but the pilots stalled it and kept stalling it until it hit the surface of the ocean. Because they spent little time acting as true airmen anymore, but instead had become systems managers, when the systems failed, they misinterpreted what they were seeing and did everything wrong. They crashed a plane that was in a perfectly safe condition.