It's because humans (and other animals) have enormous innate capacities and knowledge which makes learning new things much much simpler than if you start from scratch. It's not really because of human's computational capacity.
Hundreds of millions of years of trial-and-error biological pre-training where survival/propagation is the reward function
I don't think it's clear how much of a human brains function exists at birth though, I know it's theorised than even much of the sensory processing has to be learned.
Existing at birth is not the same thing as innate. Puberty is innate but it is not present at birth.
It just isn't needed. Just like you can find let's say kangaroos in the latent space of an image generator, so we learn abstract concepts and principles of how things work as a bonus of learning to process the senses.
Maybe a way to AGI could be figuring out how to combine a video generator with a LLM or something similar in a way that allows it to understand things intuitively, instead of doing just lots and lots of some statistical bullsit.
We do have that, ever felt fear of heights? That isn't learned, we are born with it. Same with fear of small moving objects like spiders or snakes.
Such things are learned/stored very different from memories, but its certainly there and we can see animals also have those. Like cats gets very scared of objects that are long and appear suddenly, like a cucumber, since their genetic instincts thinks its a snake.
After having raised four dozen kittens that a couple of feral sisters gave birth to in my garage, I’m certain that is nonsense. It’s an internet meme that became urban legend.
I don’t think they have ever even reacted to a cucumber, and I have run many experiments because my childhood cat loved cucumbers (we’d have to guard the basket of cucumbers after harvest, otherwise she’d bite every single one of them… just once).
DNA and the same way anything else is evolved? The body is insanely complicated, I don't see why innate knowledge is so unbelievable.