I think it's a mistake to consider equal parenting as a principle because human beings are, by our nature, very messy. At the beginning of a divorce—I'll be quick—people don't like each other, and then some people can get around to liking each other and they might formulate a better outcome over time, as Dr. Landau says.
My experience in high-conflict cases—and I've done enough of them to know—is that what Mr. Ludmer said, I think his evidence was that when parents love their children, then shared parenting or equal parenting can work, is not the problem. The parents hate each other at times. The idea that you have a presumption of equality, using that language instead, is a mistake because it undermines what's really going on. The adults are fighting about the children, so sometimes judges have to make hard decisions and that's okay, because they usually try to do what's best for the kids.
That's my view.