The title of the article is literally that they’re a hoax, yet your own points show they’re not “just a convection oven” and they demonstrably cook things differently from a regular convection oven. Saying it’s “not frying” doesn’t mean anything either: they’re not called dryers, they’re called “air fryers” specifically to indicate that they’re not just frying things like usual.
Those are not my points; they're from the article. The article agrees with the idea that air fryers are not exactly convection ovens; they're smaller, faster convection ovens.
Except for the "not frying" part. That's not in the article; it is my opinion. Frying refers to cooking in a pan, on top of a layer of oil or fat. Air does not fry.
I don't really see the hoax as much as air fryers being misleadingly named. The idea that air fryers bring about a new cooking method, or at least a useful variation in the method of baking, is more plausible than that they bring about the old method known as frying.