I was a bit confused about the blogs too, until I realized that there are two different tabs for "Blogs". If you look again at the navigation bars at the top of the screen, you'll see them. The "Blogs" tab in the top navigation bar (brown background, white text) takes you to the professional blogs (including Zoe Kessler's). And the second "Blogs" tab in the lower nav bar (grey background, black text) takes you to the member blogs.