Giggity.

"Guardians of the Clit"

This should be the story link.

Perhaps encoding "software" is more expensive in terms of codons? So it's cheaper/more likely to "implement" physically.

Having more independent samples helps filter out noise. If you had individual sensory neurons with outsized influence, then misfiring of such neurons would also have outsized influence.

Fingers, for instance, not only have higher sensitivity, but also much higher spatial resolution due to the more dense nerve network.

I can't tell why other areas may have needed higher spatial resolution; maybe it was evolutionary important in the past, and remains today. Or maybe just adding more nerves due to a random mutation correlated with better reproductive outcomes due to a stronger signal, or higher sensitivity, so more nerves are present for no other reason.

Not a dumb question. The shortest (and at a glance unsatisfactory) answer is because it works, and therefore it evolved that way.

Going in detail, first consider that for a feature to be evolutionarily selected for two things have to be true:

1. It must increase the fitness of the organism that carries it, i.e. the likelihood of its carrier having descendants as compared to non-carriers ( or be a side effect of another feature that improves fitness enough to be a net positive, etc etc )

2. It must be inheritable (and, in sexually reproduced organisms, mutually compatible during embryonic development).

One such a feature has reached dominance in a given population, as long as it continues to be important for fitness it cannot really be deprecated in favour of an alternative from scratch, even if that alternative is arguably better.

That's why, for instance, vertebrate ocular nerves connect to our retinas on the inside of our eyeball, resulting in us having a blind spot. Cephalopods, on the other hand, evolved their eyes independently the "reasonable" way, connecing their nerves from behind the eyeball. There's no way a vertebrate could mutate from scratch for its optical nerve to connect to the retina from behind without causing absolute mayhem in embryonic development. Our hacky solution for the blind spot? Let the brain hide it in software.

Going back to your question, some spots of the body being more sensitive than others became critical for evolutionary fitness long before nervous systems were complex enough to generate conscious qualia, let alone enough for them to be consistently involved in decision making. Furthermore, mapping of specific nerves to intensity of feeling on the CNS would imply complex hardcoding of something which is much easier to solve with "this place important, have more nerves", and maybe would even conflict with the fitness benefit of a CNS with enough neuroplasticity to learn anew during the development and lifetime of an organism.

So, in summary, the solution of having more nerves where it matters is simple, good enough, and has no reason to be rolled back in favour of a radically different alternative.

Male genital mutilation is very common

I don’t know about “idiots” but bias towards women was obviously real and prevalent. Treating the idea that that might have influenced medical literature as a “meme” is slightly bizarre to me.

There's a fair amount of modern/modernist-era thinking about bending the chaos of humanity to meet rigid ideal social structures, from about the late nineteenth to late twentieth century. And to be clear, the chaos of the early industrial period led to marked declines in public health, sanitation and the like. Some of these innovations worked reasonably well (the standardization of healthcare and schooling), some of them had unforeseen side effects (replacing horses and their large amounts of fecal matter with cars and invisible pollution), and some straight up did not work (much of the social engineering that went into low-income public housing in the West)