Cosmically, the extinction of humanity is of no consequence.
You're claiming that the extinction of humanity would be a mere biological incident of " no consequence".
I don't think your claim is justified by the evidence available to us.
So far, all investigations into the possibility of intelligent life in the Universe, have shown no evidence that it exists anywhere except on Earth.
This is possibly because humans, on Earth, are the first intelligent species in the entire Universe.
Someone has to be first! Why can't it be us?
If it is, and we get extinguished, that may end intelligence in the Universe
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