Warner's kinda right and kinda wrong.
He's right: Zen brings up lots of repressed crap. He's also right when he says, "It’s also true that zazen is different from other forms of meditation (if zazen is even a form of meditation) in that it is not directed at any ideal condition."
But he's slightly wrong when he says, "In zazen you allow whatever comes up to just come up as it will, rather than attempting to move the mind toward a specific desired state as most forms of meditation do."
Strictly speaking, the last thing is for those who do shikan taza only, and most of us have to be able to put the mind in a place where we can do that in the first place, at least in the Rinzai tradition.