You raise a very good counter to what feels like the main thrust of the guys article. It put to words something that felt "off" to me while reading it, that there was an assumption made that was never stated and was also incorrect - so thanks for putting that to words.

He seems to assume that there is 1 air fryer that everyone on Earth should be getting, and all others are strictly inferior. There are probably no products that exists where that logic is true. There is so much variation in cost vs quality, or entire feature-sets like you pointed out.

This bleeds over into incredibly "messy" areas too, like societal signaling. Someone might specifically want a more expensive version of something simply because it's more expensive. The author doesn't seem to account for any of this complexity, even the "simple" complexity of cost/quality/features.

The value that these types of ads can add is that Amazon can build up models that can "learn" and get better at matching every unique persons criteria and provide a way for vendors to get "matched" with that buyer. Obviously you can still critique this model, but to assume it's strictly bad feels like it lacks nuance/critical thinking.