I rewatched #MulhollandDrive last week and is Rita/Camilla the real girl and Betty/Diane the fantasy girl dream-walking version of herself created after she takes the shortcut to career success?

Is that why Rita takes Betty to #ClubSilencio, hoping Betty doesn't talk, revealing the true nature of the beast, thus committing career #suicide?

Rita does thank Betty earlier for doing what she, Rita, couldn't, thus protecting her.