I think it's hard to understand how simple this concept is. So as the Peter White article explains, as you bend over, your butt goes back. This doesn't mean that it takes no force to support your torso when you bend over. So stand up and bend over. See how that feels? Your back makes a very slight effort to support your torso. That's what it should feel like when you take your hands off the bars. Nowhere is it said that you shouldn't be putting any weight in the pedals. In fact, you're really supposed to do this hands off test while pedaling on a trainer. The idea is that you shouldn't slide forward off the saddle with the pedals slightly weighted and most of the weight on your butt.

A little experimentation will show you that you'll be able to take your hands off the bars over quite a wide range of saddle adjustment. So now what? What's right?

Well, I do exactly what Peter tells you not to do: I drop a plumb bob from the bony protrusion below my kneecap to intersect the center of the pedal axle. For me, and everyone I've done this with, that has given the perfect hands-off weight distribution. If you need your saddle further back to get that weight distribution, move it back. If it feels too far back, move it forward and take your hands off again. But at least it's a starting point.