Tablets are most useful when you have a job in the field. For personal use, I’d just rather use a phone or my laptop.
Es there are some limited use cases for them but for the average person the only real use case is media consumption.
When the only mainstream use case for the item is this, there is little justification for a premium brand there. Eventually the public figures out there is only one use case and the cheap guys do it just as well as the expensive guys.
Ergo, tablets are niche market items when it comes to justifying a premium brand for it.