Why does the brain have no pain receptors? Shouldn’t it considering it’s one of the most vital organs.
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Because we evolved that way. Evolution doesn’t work on “should” or what would be ideal or best. It’s not directed. It’s random. Our brains don’t have pain receptors because we never evolved to have them, or there’s some detriment to having them.
Even if evolution did move towards some ideal or some improvement, it still wouldn’t matter. up until *extremely* recently in human evolution (roughly 100 years out of 300,000 years of human evolution), there was nothing we could do about damage to the brain, so having pain receptors would have been of no use.
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