Some, when having overcome cancer themselves, are willing to just dismiss all others who suffer from the disease, since they are in remission. Others devote life and energy to the eventual elimination of the disease that so negatively altered their lives. Which is the noble action in your opinion?
If by naive you mean telling it like it is then I prefer to be naive rather than bitter and miserable. The only difference between your example is that those people usually want and need the help. Those that are still in this cult most don't want help and aren't asking for help. They are on it because they want to be in it. You can call it brainwashing, or stupidity but the fact is that if they wanted to leave all they had to do was leave and nothing else.
Bottom line, call me naive or lazy I don't care about trying to change peoples minds who don't want to change in the first place. Now, if they were to show signs of wanting to get out of course I would help. Otherwise I won't turn into a bitter person just because I can't change their views over the wts.