What, specifically, is not a necessary component of Communism? The version of AES that exists in your mind, full of anticommunist prejudice and red scare mythos clouding your judgement, or the version that exists in real life, with far more nuanced issues applicable to all of Socialism, past, present, and future alike?

Further, the Kim family does not have all of the power in the DPRK. A critical examination of the structure and history of the DPRK proves that isn't true. That's like saying the Bush and Kennedy familys have all of the power in the US.