I seriously disagree with this statement. Not only can the audience pick and choose which bullets they swallow, the speaker herself also can deviate or disagree with what they previously had written.
PowerPoint can be as dominating as the author suggests, but only if the PP user allows it to do that - in which case any other medium (including blackboard) would do the same.
It’s dangerous because it can create the illusion of understanding and the illusion of control.
so does any other medium for presenting information - including text. This author has proved that he can create the "illusion of understanding" without approaching at all a nuanced understanding of his subject.