Can't speak for op for but me no - it was just ingrained as something disrespectful to do to books. Sometimes you've got a taboo like eating with your left hand that has a pretty clear reason for coming into existence (you use your left hand to clean up in the bathroom and before hand soap in the era of everyone dying from cholera might as well keep those functions as physically separated as possible) but this is more just something you would be disrespectful to do