Lol. So if the story of how the rings were created is known wouldn't a show having nothing to tell? There are a lot of blanks in Tolkiens work because he only told the story of a specific time and left the rest up to "trivia" about people, places, and things. There would still be questions unanswered even if they tell it like you say because we would be learning things as they happen.
Weird that the same criticism would exist but you accept one over the other.
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A trick? No. It is just the way things work. Sometimes things get answered quickly and other times they do not. It has no relevance to the plot being utter garbage or the greatest thing ever. Even books do this as different plot threads come and go. I'm not talking about terrible books either as Wheel of Time, for example, has some things that get left unanswered. It just happens.