is it true that it's a tradeoff ? the "more precocial" the less flexibility to learn new things ? on the contrary knowing less equals less assumptions, which needs more flexibility in exchange.

Would be true that what is precocial in us is the ability mimic and abstract specific patterns into general rules ?

Naturally, I'm a dev. Could it be something to do with limited genetic storage being dedicated to software instead of coding for hardware capabilities? In my limited knowledge, increasing DNA size comes at a maintainance cost(transcription, replication etc), so there's a soft upper bound.

It must be a tradeoff. I don't have any proof, but my thinking is that we pay an extraordinary price in terms of resources required to keep human babies safe for years before they can keep themselves safe. That is a strong selection pressure on everyone involved. The fact that it still happens means it must somehow be worth it.