Acharya Prashant explains that existentialism, while recognizing the deceptive nature of the self, lacks the rigor of Advaita Vedanta. He notes that the ego loves to rebel against societal impositions but merely substitutes one object for another rather than questioning the chooser itself. Without self-inquiry, the ego avoids the void by claiming personal choice as the final answer, never truly encountering its own blankness. Advaita Vedanta, however, focuses entirely on the actor rather than the action, asserting that the doer is the root of the problem.