It is kind of hard to make good drama out of "everybody is doing farming and helping eachother to get the best out of a shitty situation". It is a lot easier to imagine a good narrative when there's conflict, danger and violence in the picture. The capitalist idea of "human nature" as inherently selfish and evil also push writers towards the more violent narratives.

But could you make a good and engaging narrative based on the premise that humans are inherently good and altruistic? While danger makes a story engaging that danger doesn't have to come from Mad Max style psychos in bondage gear. The dangers facing the post-apocalyptical society could be the dangers connected to surviving in a world where all supply chains and infrastructure is gone and people have to relearn subsistence farming fast not to starve to death. The danger could also come from the before times, like radioactive fallout or whatever. You could even throw a few leather enthusiasts with guns in the mix but present them as the unsustainable anomaly such marauders would be.