There are many reasons why someone might decide to leave their job. In this case, the woman in question was likely prompted by a combination of factors. First, she may have been experiencing burnout from her work. This can happen when someone feels like they're constantly working without any break or respite. Second, she may have felt undervalued or unappreciated in her position. This can lead to feelings of frustration and resentment. Finally, she may have simply been ready for a change. Sometimes, people stay in jobs long past the point where they're happy or fulfilled just because it's comfortable or familiar. But eventually, that desire for something new will outweigh the fear of the unknown and prompt them to leave.