Why Perfect our Internal Data and Processing?

Basically, we have goals, drives, desires, motives, and we want to achieve or satisfy them. But the natural world is not ordered to our desires.  Hence the development of internal data processing in animals to do the work ourselves.
The better we can know the right thing to do in order to satisfy our goals, the more successful we will be.  (see also:  paved with good intentions, and True Moral Facts).
To get an idea of how much advantage this all gives us, see "Mechanists" as the "bedrock of civilization"
A deeper question might be "but why is the universe like this?  Why isn't it the way we desire it to be?"  For that, see:  entropy, natural undesigned universe
We can think about the future, we want each point along that timeline to be good for us, we can imagine and discover means-ends chains to produce that result at future times.
hard to do it all on our own, and conflict can arise. Useful to be able to build reason-chains in other people's brains, or have them do it for us, hence language and also division of information processing labor.