Her art, whatever you think about it as an art or performance, is about exploring the relationship between the performance and the audience. In her case, it's also body art and endurance performing.
I saw it as a commentary on how society treats the weak or less powerful. Some, but importantly not all, of us will exercise our power and will over other people, given the opportunity. The motivations for why some might choose to assert dominance over someone with less power could be interesting territory to explore in this piece, or perhaps a different one.