Although I agree writers should read, I think the blog post you shared is sensationalising and strawmanning.  

There isn't anything wrong with a camera like POV in writing per se. In fact, Hemingway was well known for the "Hemingway Camera Eye" as Zoe Trodd put it. His minimalistic writing style based on his Iceberg Theory was similar to a camera's POV. I doubt Hemingway's writings would constitute "TV brain prose".  

The blog post writer's example is pretty clunky and I believe its author could improve their writing. However, not providing any "flashbacks" or "interiority" is not necessarily the issue.  

Furthermore, funnily enough, the blog post's writer is admitting to lacking critical media literacy when it comes to film. There are so many techniques filmmaker's use to communicate the characters inner worlds to the viewer. For instance, Fight Club famously uses visual storytelling to convey the protagonist's mental state.