I'd say that her motive might not have been obvious to those outside aviation. We read the article, and 2 things that pop out immediately, even though they are not explicitly stated are: "New hire in probationary period" and "investigation into drinking within the window" and for us, the significance of that is obvious it's not a bit leap to: " she knows she's toast and it's an act of desperation to save her job." Someone outside of the industry likely isn't going to recognize that she's in imminent danger of losing her job.