One of my favorite things is to listen to an artist of any kind retrace their creative steps. I understand why they’re reluctant to do so because it’s difficult. Building an idea is not like building a physical object.
For this reason you usually see artists give a glib answer to get through the question. But Simon at least explains the mechanics of how she pulled the different parts together.
You can clearly see Simon holding back on her answer because the song is extremely personal. But that is what made the song a classic in the first place