It's not just that people haven't read enough of the article to see how limited the evidence is, they haven't even read enough (three paragraphs) to understand the mechanism by which the author argues that ads make people unhappy: by making them aware of things they want but can't afford.

But this also applies to a lot of media that people consume on purpose, TikTok, Instagram, TV and magazines about the rich and famous.

It implies a curious understanding of what makes people happy. Why do people follow rich celebrities on instagram rather then homeless people, to feel better by comparison? Is it because they don't know what really makes them happy or is a relative measure of happiness perhaps insufficient?