I mean if we're going for snarky takedowns how about "if you identify most strongly with the attention-seeking liar in the story I don't think I need your advic

I mean if we're going for snarky takedowns how about "if you identify most strongly with the attention-seeking liar in the story I don't think I need your advice." But more seriously you can take more than one lesson from a tale. "A threat may be real even if the one relaying it lacks credibility" is not a neat or satisfying morality lesson to feed to children, but it remains true in my experience.