The problem is that an educational system works on you not being dumb, not not being focused. Years spent in school do not help a lot on focusing on things. Everything is either pharmacy (ADD) or folklore. In an age where a TV spot can have no more than 2 sec focused on a single thing, because the viewer's attention is low, what good is to say that it's easy. In fact this thing - learning how to focus - is hard. Really hard.