To start, I love Plath and she is much smarter than I will ever be. However, as I read more and more of her work, I am struck by how small the amount of perspectives employed in her work. She really seems to focus on the point of view of people a lot like her or who have experiences similar to her. This seems most pronounced in *The Bell Jar* where so much of the novel is based on Esther's feelings in a way that is never really shared with other characters to the same extent.
Obviously, there's nuance to this, "Thalidomide" is a notable counterargument. But I think her perspective is much more focused than, say, Virginia Woolf who is willing to look at the world from a relatively larger amount of perspectives more regularly.
Additionally, her focus on her own perspective could be, itself, a form of empathetic writing. In the specific is the universal, and God knows that her writing is very cathartic and relatable to a very large amount of all sorts of people. #entertainment