Many of us aren’t writers, per se, but we end up doing a lot of writing to communicate what our real jobs are. This utilitarian writing often consists of taking a mound of disparate facts and explaining them through organization. This is a complex process that’s hard to do in an information-free writing environment.
He’s got good thoughts on distraction free writing tools. I try not to get caught up in the ideology behind these apps, and instead focus on whether or not they meet my needs better than other tools. So far, writing in an app like Pages or TextMate is more annoying to me than Ulysses or Writer (Pro). The good doctor is right, as it does come down to how you write.