Because like someone said on this forum before, GKC is more important than GKL. If they didn't use GKC dialogue so much I would have thought because they got Adi back after a long time, so they have this fear of loosing him again. They want to make him comfortable so he will stay with them. But they think of him as GKC so that's the main reason. (Sorry for the rant but the GKC dialogue has offended me a lot)