Practiced by Apple? Just because someone is doing it doesn’t mean that every company does it.
Even though they can and do pay for the highest-profile placements, they also do shady guerrilla marketing "just in case," because they have a whole lab that just analyzes channel efficiency, and they've discovered that anonymous comments on Reddit in random channels have 8.7x the effectiveness of YouTube ads, especially among the coveted Pale Incel demo.
This is how they got to be a trillion dollar company after all! It was marketing, not product.
As you say, Apple would not be a trillion dollar company without a great product, but you can build something great and also aggressively market it. Nobody is saying they got where they are just with marketing.
[0]: Obligatory https://xkcd.com/386/
I mean, it's pretty much just blind conjecture that they may be marketing in stealth in the first place, so really who knows on that front. But you gotta be smoking something to think Apple doesn't want their low margin products to sell like hot cakes. I mean sure, they'd love even more for their high margin products to sell like hot cakes (like the Mac Minis that are useful for AI like in this story), but the low margin ones literally make up for it in volume so you'd sure hope they sell well.
They are a trillion dollar company, that wasn't by accident. They are marketing and sales monsters. Arguably of the big companies, they are the ones that have mastered consumer perception the best of any company on Earth. They would like all of their products to like crazy always.