A little context here might be good. The supposed disbelief of Blackberry was their carrier deal, as they themselves were not _allowed_ to sell phones with that feature set.

It wasn't unthinkable to build it engineering-wise. (It was expensive yet with underwhelming features, a 2G phone with no apps at a time when even feature phones had 3G and apps for almost five years.) It was unthinkable business-wise. Those rules are easier to play hard and fast with.

That there is unfounded criticism doesn't mean all criticisms is unfounded.