Idk, I thought there were some refreshingly honest scenes in there. Like at the beginning of season 2 where you could expect >!Patti's death!< to remain a secret hanging over Kevin's head but nope, >!dude goes and digs her up and then lets Nora and Jill know all (OK, almost all) about it and even how Matt helped out and by the way he smokes!<.

Edit: although yes to be fair the existence of an entire cult of people don't talk does speak (hm) in favour of the show's inclusion... Also Laurie's entire season 1 plotline and a certain secret of hers. But still to me it's less a case of 'people don't talk because the plot requires it for drama' and more 'the very premise of the show results in people not talking' (ie the trauma is so unfathomable and strange that people can't put it into words).