Physical world may be a fractal of complexity, and nature doubly so, but one of the thing a human brain is good at - and arguably one of its most important function - is filtering all that out.

This is the reason I chose to write "experience density" and not "complexity" in my previous comment. A tree may be infinitely complex, and the first tree you see is profoundly interesting. But the tenth tree you see is just a tree. Soon after, you don't even notice them anymore, except in situations when you have a reason to care, or you see a tree that is very different from all the trees you usually see.

You're correct on the JPG size difference between indoor and outdoor shots. But just because something is too complex to compress well, doesn't mean it's interesting.