No he's 0% correct and I will explain why.
You want to leave the susepsion alone? Then don't lower the car at all. If you DO lower the car, you are changing the articulation neutral arch of the suspension links from -1/0/+1 range of horizonal level to 0/+1/+2, or even +1/+2/+3.
Some of the arms are shorter than others and are ment to increase cmaber with body roll, as well as increase +toe on that side with body roll. The increase negative camber (called "camber gain") is promoted to counter act both body roll AND tire lateral tire footprint distrotion. Strating with it in static form as you all know creates inner tire wear-thus the eamples of a 0 or even +1 starting point.
Now to the toe= the toe kindof does the same thing in roll. It induced a little turning of the outside rear wheel intot he direction of corner path as the car rolls and the suspension tucks, this effect is called "roll induced understeer". you lower the car and again you are changing the static position of toe.
You need to change this settings on a lowered car so they essentually are NOT changed