I agree more with my grandparent post than my parent post. We have (as individuals) learned to value certain particular kinds of achievement, and when we do achieve those achievements, it makes us feel satisfied.
Says who? Based on what?
You are seriously underestimating one of the hardest questions ever posed and for which there is no (and there may never be) definitive answer. Tabula rasa, genetic determinism, nature vs nurture, etc are all deep, hard problems.
As a matter of fact, can you even significantly define “desire” or “instinct”? A lot of smart people have tried in the last 2500 years and there is no consensus yet.
That said, I'm not implying we have built in instructions to go create a townhous. Simply that there is possibly a driving force that compels us to create, then a reward for doing so.
How does, for example, sexual arousal fit into that theory? Sure, it's a desire, but can you argue it's not an instinctive desire that evolution has given us for pretty obvious reasons?