I'm not criticizing the technique from the article. It's useful. I'm just expressing my confusion that the blog, simple as it looks, needs this JavaScript (and analytics are in a separate file from the one I'm referencing, it appears).
The reason for its size is my site is my playground. It's where I get to experiment with all the things I want to experiment with.
I also work on quite a few open source projects, which I usually test on my site before releasing them publicly just to make sure they work in production without errors.