I’m not sure that’s true. We have literal billions of years of training.
If you wanna get philosophical then the decades of research that humans did is also AI "pre-training". And all of that is built on knowledge that humans have spent our whole existence amassing so maybe all of human "pre-training" is also AI pre-training.
A fun but silly exercise.
Human "pre-training" is vastly underappreciated.
Hell, animals are an even better example. Many animals pop out of the womb and start walking and eating and acting just like an adult!