Healthy ego functions as a temporary social mask that allows confidence, self assertion and humor to flow. A healthy ego changes without dissonance to match new information, it doesn't push it back without considering. A healthy ego isn't a threat to self or others, but a useful filter that serves as a vehicle of free expression. The healthy ego laughs at itself and laughs with others. Killing it would be tantamount to tearing off an arm or slicing and dicing parts of yourself. I don't see value in killing your ego, but then all force is abhorrent to me. I'd rather make friends with mine, give it a hug. It seems a more productive and positive path.