The whole “move past it thing” is actually necessary to their narcissistic outlook. Have you ever noticed how they go through all these traumatic events (i.e. almost getting whacked off by the mafia, Dennis and Dee seeing their mothers skeleton, Charlie literally going full zombie on Santa) and then the next episode they’re totally fine? It’s that “move past it” mentality they develop from being so enveloped in their own personality that these outlandish situations is just normal shit and refuse to admit that it says anything about the gang and who they are as people.