Now I'll ask this as a long time fan of BB (in the past) and a person who's been using keyboard BB models daily with no interruption since the 6230 (circa 2003) up to this day: have you tried internet browsing on those things lately? It's better than nothing, I'll give you that, but just marginally. And that's not the only thing they don't do well. Even the age-old argument that physical keyboards are better/faster/whatever was destroyed a long time ago. Even after years of using the BB to the point I thought I'd get RSI I managed to be substantially more proficient with a virtual keyboard in no time. I can't imagine a scenario that's not the weirdest corner case where the BB does better.
Probably the only thing they might do better is typing while driving. Something that is more likely to classify a person as a power-loser. And that's because as this article says, touchscreens and controlling multi-ton vehicles don't mix well.
I think the argument of "professionals use Blackberry, amateurs use Apple" expired a looong time ago. Right around the time everybody gave up their Blackberry (including Blackberry) for an iOS or Android device. People should stop pushing that and try to find something else to make them feel important, smart, whatever.
Doing things the cumbersome way doesn't make you a power user. Doing them fast and well does.
But phones these days are primarily used for consumption and non-textual content creation.
But considering the total usage scenarios of a modern day smartphone such a narrow advantage tends to pale. To the point where claiming that a modern touch UI (iOS/Android) is for "lowly skilled users" can only be gratuitously insulting a vast majority of people, or simply an attempt to artificially elevating your own image.
While personal preference is up to each of us, issuing such blanket statements based on those preferences will invariably be wrong. If you need a Blackberry to tell people you're a "power user" then you are not a power user.
How is this obvious? My impression is that this only applies to casual users, i.e. Apple designs UIs mainly for lowly skilled users whereas others focus more on mid-range or power users.