The same is true of the iPod and of the iPhone. To me, that doesn’t diminish from the fact that those are/were best-in-class products, but the ubiquity is absolutely based on fashion.
The same is true of the Apple Watch. Of course the irony here is the Apple Watch was very much marketed as a fashion accessory first. That didn’t work. When the messaging pivoted to health and those capabilities got better then the completion (and there is no Android Apple Watch competition. Fitbit is the closest.), adoption spiked. But again, there is a still a very strong fashion component, even tho that isn’t a large part of the marketing anymore (the attempts to target luxury fashionistas have shifted and that has IMHO made for a better product all around). You don’t get a smart watch. You get an Apple Watch.