Norm Sanders' short story about the crash of the Lion Air Boeing Max in the Java Sea (2018) perfectly illustrates how such a fixation may become fatal at a crucial moment. The rather inexperienced pilots continue to obey technology, and go on stubbornly interacting with the MCAS-app who misdirects their plane (up and down), until they crash. If they had deactivated the MCAS with the cutout switches and reverted to manual trim instead of fighting the computer, the accident would not have happened.
During the previous flight of this same aircraft happened to be an older pilot on board as a passenger, who convinced at a given moment the crew − who were also stubbornly wrestling with the app − to pull the plug out of the app and start to fly hands-on. Then that same plane didn't crash. It can be as simple as that