Comment by chii

grammar and rules of language has almost nothing to do with the difficulty of writing good text (ala, written prose fit for purpose).

Understanding of grammar and rules of a language is like having good bricks, but building a stylish house is more than just using good bricks. It's a higher level cognitive exercise. Schools attempt to teach this, but i think they fail quite miserably (look at how essays had to be written by students, and how poorly most are written).