[Retric]

People can recite books just fine, let alone poetry. Granted, it's something of a lost skill, but one on one interactions are not limited to dialogs even if they may enhance exposition.

So, you gain absolutely nothing by writing the spoken word down as a skilled orator can speak with a nuteral tone when desired but the written word can't add inflection.

[eru]

Sometimes deliberate ambiguity is part of the art. (Also, on a more practical level, books are better at random access.)