Basically the points I summarised, yes. I have played Fallout myself, yes. I know that Caesars Cult Legion is not like the rest. By far not. And that's just an example. Still. The main themes, are quite overused. And in a RP environment, that has otherwise nothing to do or any connections to the Fallout universe, these points and themes are quite limiting still.
Hence, I do not like Fallout themed nations. There. I said it now.