Intentionality is where the fallacy is occurring.
All effects have causes, that we've observed.
All effects were not INTENTIONALLY caused(or, a "goal").. and that is where the leap is being made.
They were if intelligence is the intention of the laws of nature.
That's putting the cart before the horse, though, ding.
The entire ecosystem of our planet is also mind bogglingly intricate. My Japanese maple is not intelligent, though, and probably never will be.
Yes, it is complexity upon complexity. It is complex adaptive systems within complex adaptive systems which seem to defy the law of entropy.
But there is no disputing that as the arrow of life increased the complexity of life increased. That is the nature of a highly complex adaptive system. The real question is why is that the nature of highly complex adaptive systems and the answer to that appears to me to be intelligence is trying to emerge. Did you know that even plants can have what is described as intelligence?
I don't know the "reason" for that. To me, it just seems that things grow and evolve because they do. If they grow and evolve in a way that allows them to survive, they do it some more.
Not only that, but natural selection is not even linear in each genetic mutation.
There are such things at "negative" mutations, meaning, less conducive to survival. Over time, lawwwts of time, non beneficial mutations are reproduced out. Also, more are forming. That's because something is not reproducing all that much if it's dying. The process is random and the results have been duplicated.
Want to know something even crazier?
Our "intelligence" can have negative effects on our mutations, because we "usurped" the process and now folks are reproducing en masse whether they have ideal traits for survival or not, because we are now protected from natural processes (being hunted) by other means. (tools)