Problems with focusing?

As new Mac user I’m reading a lot of stuff about it. And I’ve realized that apps helping you to focus on some subject are becoming more and more popular. Just to name two there are: Concentrate and Think. They have only one purpose to isolate apps you need to work with at the moment and let you concentrate on your work, so you’re not being distracted by incoming mails, IM messages and so on. I wonder if people really hit this level that they can do it by themselves. When I have a work to do I’m just doing it and have no problems with paying attention. Or maybe users just want to feel like some writer or artist with only typewriter or easel in front of them, completely targeted at the subject. Maybe, but still I find it weird. But maybe I’m weird, not buying this entire “go to Starbucks to write a blog post” thing. Possible.