"the world was filled with dinosaurs
The world is still filled with dinosaurs, but we call them birds to avoid hurting their feelings. Does this invalidate your conclusion?
we are all going to die like them
We are all going to die anyway, and every sane person knew this long before the non-avian dinosaurs were discovered.
unless we become fighters
I have known for about 60 years that I am going to die, but this fact didn't lead me to become a fighter. From the evolutionary point of view, the important thing is to leave descendants when we die. That's why avian dinosaurs (or birds) are still around; their Mesozoic ancestors did leave descendants.
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