I respectfully disagree -- A long arc of history has shown differently. If you are curious what I mean, that video makes the case. a politcial party's leadership tier is tremendously powerful and legally independent regardless of whether its 2 people, or 15, or 5000. They decide who the candidates will be who wear their logo. They have proven in court that they can and will disregard or meddle with primary votes if they want to, or change voting rules with tools like superdelegates, at will. They are legally a private corporation who make their own rules, and the courts dont hold them to much of anything in terms of the fairness of democratic principles in their internal rules. The party leadership is the layer where the rubber meets the road -- where capitalism meets with government to make sure capitalist interests are represented in candidates DNA. They will make sure a mamdani-like candidate never makes it past a primary. No amount of reform will change that.