Plot hole: In the first season, Lucy Ewing had an affair with Ray, the farm hand at South Fork. Several years later, it was revealed that Ray was actually Jock Ewing's illegitimate son, making him Lucy's uncle. However, the subject of their affair was never raised, even though they surely would have been at least somewhat traumatized upon learning of the accidental incest.
Revealing mistake: At the start of every episode, during the credits, you can see the shadow of the helicopter filming the aerial scenes.
Answer: In real life, that might happen, but this is a fictional TV show that revolves around the characters and the dynamic interaction between them. Getting rid of JR, a main character that much of the story line revolves around, would make the show far less interesting, less melodramatic, and less intriguing. It's just an entertaining, over-the-top exaggerated soap opera.
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