But that's just not how a neural net works
I'm guessing when in the FOV of an infant people twnd to be more expressive and move their heads around more because they
want the baby to look at them, they want it to see them, to remember them and to recognize them when it sees them again, which they achieve by making their heads, faces and eyes the most dynamic/interesting thing in the infant's FOV, and from then on this impression is supported by confirmation bias.
But hey if you can explain how billions of neurons organize themselves into a highly specific data crunching recognition system geared specifically for the vaguely defined input signature of "human facial features" based upon genes
which they all have in common then by all means please blow my mind.
How do you figure that's not how neural networks work? Studies have shown that newborn eyes seek out patterns resembling those of faces. A simple Google search should be enough to show you. The explanation is almost unbearably simple, too; Evolution. The more ready a child is for being part of human society at birth, the more likely that child will survive in it. Of course human children are born ready to be human. Their neurons need to develop in very specific ways in order to function as one. It's not like their brain is initially a purposeless mass of neurons. It has to, at the very
least, provide life support functions. Is it not obvious to anyone, from any culture, what crying looks like, or what laughter looks like?
Of course children are born with very basic social characteristics, as we're a social species. It seems almost silly to presume all of those social impulses are learned. I mean, sure, specifics are learned, hence culture, but how could basically every human be so strikingly similar without at least some portion of it being innate? Notice how alien people seem when they have some sort of abnormality like the inability to feel fear, or something. Why do children tend to identify more with same-sex parents even without prompting? Etc...
Here's a good one; Sexuality. Are people naturally attracted to people of a specific gender or not? Is gender recognition something we learn, and then rely on that to determine which gender we want to have sex with, or is it something someone is just naturally attracted to? I like how women look. Why, then, do many people seem to have no control over which sex they're attracted to?
If something as distinguishing as sexuality is innate (ignoring specific fetishes or other aspects which are probably learned, but the mere natural distinguishing of, and taste for, specifically sexual differences), then why would we presume there are no other natural preferences or abilities to distinguish one thing from others? Why does sex sell? Why sex at all if there's no natural sexuality?
I tend to think of society as both an instructor of young minds as well as the result of them. It doesn't exist in a vacuum.