What do you mean "impossible pipe"???
The Great White Book clearly states that the "choice" has nothing to do with him. He simply ENHANCES the negative already in people. In other word's the DO isn't responsible for the choice at all. If anything, he's taking the choice away by pushing people to make one choice rather then the other, or at least making the choice harder. At any case, he's twisting the choice people have.
Rand had the opportunity to kill him, but he believed the DO is indeed the choice people make, but he was wrong.
Yep! It is written as if someone from the Third Age was sharing information. It is not and never has been a completely reliable source of information about Randland. :P