I've asked myself this question for what seems like forever. As a high school student (more than 25 years ago) I started pointing out 'oddities' in text books to my teachers, yet never got any "good" answers....for instance:
One paragraph would state that an electron is too small to measure, while in the next sentence, they say they can count them....hmmmm...how can you count that which you can not measure?
Here's another oddity...'they' say that at absolute zero, all molecular activity stops...and they have proved it in a lab...hmmm...what about the fact that the lab is moving through space at 66k mph?