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The events in the story are physically impossible. But still, using the plot line of The Walking Dead to justify yourself feels silly, but somehow old story's are given a free pass. Sorry, using a collection of meaningless words to justify thoughts or actions is irrational.Sorry, but the story of Icarus is loaded with meaning, a meaning which has been examined, discussed, and argued about for two millennia by some of the greatest thinkers.
Most of myth, just like cautionary tales and proverbs, is meaning concentrated. It is an observation/insight/point made into story.
It's your comment that rather seems devoid of meaning, seeing that humans have been able since forever to construct stories, metaphors, and examples from both real and non-real-world-events to convey particular ideas, concepts and worries.
There would be nothing silly to "using the plot line of The Walking Dead to justify" one's self if it works for making their point.
What would be silly would be if someone conflated Icarus or the Walking Dead plotline for something that actually happened. But nobody does that -- they recognize it for what it is, a metaphor, and are able to see the point being made, regardless of if there are wax wings or zombies in real life.