Why are people so dumb?

I'm not even trying to be rude but why are students so dumb and ignorant. I was studying for my geography test and I looked around and saw people literally not knowing where the Philippines was, not knowing where Japan was, mixing Japan and Korea up. I remember thinking to myself, is yall serious? is it that hard to look at a map and remember even just a little bit? The very next hour I had science and the teacher was reviewing past material, and literally it was me and 1 other person answering all the questions, could yall not remember what you were taught even a little bit, like???