I think it's still difficult to write about motherhood and anxiety, that talking about not wanting to be a mother or feeling ambivalent about motherhood makes people uneasy. The ambivalent mother is certainly much more interesting.
Usually at the core of fiction that has some element of the absurd there tends to be an examination of some societal ills that we should talk about more than we do. And it's funny, of course, so we have that release valve with absurdism. It offers us a safe way to explore difficult subject matter.
I think that absurdity in literature looks into a lack of meaning in some important and fundamental way. It allows us to ask questions in ways that other forms can't, or in ways we can't using solely traditional means.