I think this is the crux of the article. In the past most people have considered photographic evidence to be very convincing. Sure, you could be removed from a photo of Stalin, and later people could do photoshop (with varying realism), now it’s a few words to make changes that many people believe without hesitation. Soon it will happen to video too, very soon.
Most people are not ready for it. Even shitty AI photos on social media get huge reactions with barely a handful calling them out.