Interesting question about the sheer amount of information. I am not sure about this, but my guess is that we (people) are not too good at dealing with things that we cannot classify (e.g., What do you mean you are not a Democrat or a Republican?) or readily name (e.g., What is this interdisciplinary studies or communication studies, anyway?).

I am not sure why, but people seem to like living in boxes and being surrounded by other boxes.