I don’t know about the show up argument. Bernie had his big deal event a short walk from my apartment in Queensbridge Park, right next to the largest public housing development in the western hemisphere. Most of the local reporting after the event was about a few angry people who were mad and didn’t know the event was happening in advance.
But like, what does showing up even mean? What specifically is Biden doing that counts as showing up that Bernie, Warren, and others are not doing? Also, they aren’t stupid. If failing to “show up” is what is losing them votes, why aren’t they doing it starting yesterday?