It seems like you're suggesting that there aren't massive biological differences between a wild human and a crow. This is false. Humans have many biological faculties that crows simply do not have.

For example, the wild, untrained human still has the biological faculty of language.

That is, there is a reason why no animal other than a human has been shown to be able to learn a language. The reason is that they do not have the biological faculty of language.

You suggest that "generations of humans don't have to keep re-solving the same problems/" This is correct, but in many important ways it is not because of our culture or because we learn from our elders. But rather it is because of our genetics.

An example of this is that children who are not taught a language will spontaneously create their own. Normally this won't happen, because children can't survive without adults, and adults will teach the children language. But something very close has happened a few times, an example, in itself far from conclusive, but still illustrative: https://en.wikipedia.org/wiki/Nicaraguan_Sign_Language