Not sure. Many teachings, religions are addressing removing ego from your thoughts. I heard that if you take LSD you can actually feel your ego gone with the feeling of being the one with the universe. Might be a great experience?
Ego death from psychedelics is realizing ego is a tool, that it isn't truly you, just a tool or armor you use to navigate reality. We live in a self-interested world, people must have an ego or you get steamrolled by the machine and divided by walls. Ego can help you tear down the walls or ignore them entirely as they are the ego of the real world and others. It helps you realize the world is nothing, unless you make it something, unless you create it for yourself.
Ego is "a person's sense of self-esteem or self-importance" and "the part of the mind that mediates between the conscious and the unconscious and is responsible for reality testing and a sense of personal identity".
Awareness of ego is key, psychedelics help you recognize it is an abstraction to you.