Not as a knock to the author but I feel like this is a wildly optimistic / simplified take. The type of audience pis serve is either industrial as part of a product or process or tinkerers that often want to follow some set process like installing retroarch.

Not to mention not all phones are hackable, they might not have the gpio or software you want or ecosystem (I’m quite fond of the Poe hats for example) and frankly if you’re buying a pi you’re obviously not the person who has the perfect hackable phone lying around or otherwise can easily source one