I think therefore I am. And so the world outside can't be confirmed, only your own existence? I get it. But what if the more objective party, society, a collective of subjectives, disagrees with you and your existence? It doesn't matter what you think, you will not think or be if they deem your "truth" an untruth or a threat. I think it's at least for this reason that the ego should be somewhat tamed and not undermine the objective or else the subjective becomes more endangered.