I didn't mean what I said as any kind of insult or anything, it's just something I've come across time and time again. Being a woman of science who also loves arts and writing, I've been involved with both worlds, inclusively organizing writing contests back in college. Despite the judges being language teachers, inevitably the top rated works were always from STEM students. Unfortunately, humanities' students are robbed of a deep understanding of the actual world, how things truly work, and that always shows.
That's the point. Nothing and no one builds/does anything if they don't have a reason for it. In animals the reason is always practical, even if in weird ways. Animals build nests to live in, sing songs to attract mates, move around to find the best hunting ground, etc. They never do anything for no reason. And neither do humans, we just add "because it's pretty and that gives me pleasure", or "because I want to share my experience with as many as possible", and other reasons.
As for animals not realizing they could build a better nest, the thing is, animals take a long, long time to adapt new techniques. They run mostly on instinct and the usually short-time education the progenitor(s) give them. Information and techniques are passed on with little to no innovation. Long ago it was the same with humans, but progressively the time we're considered not mature, the time we spend learning, has been increasing. So has knowledge. Even during as recent as the Renaissance, some people could absorve a lot of knowledge in both sciences, art, theology, etc. Now it's impossible, the amount of knowledge we've acquired is simply too much for a single human being to absorb. And the more knowledge we have the more we can innovate on top of it, that's how the past 30 years or so have allowed for a huge jump in human technology.tha