This article makes me furious. What does the author want to tell us? That everyone who feels like an imposter, and talks about it, is an arrogant arse that only wants to brag? Maybe he is and all the people he meets are.
But me as well as many of my close friends (none of them arrogant, I assure you) do feel like an imposter at their specific jobs from time to time. It's a thing that holds us back, a personal insecurity that we just carry around. We have learned to live with it and accept it as just something completely normal, especially because we talked about it.