The python server is not meant for production, serving files from it is incredibly slow and resource intensive. It also is not full webserver. There are better options for serving files
Ofcourse, this was just an example. One of the prod solutions can be Nginx.
Adding that to the blog post would strengthen the argument.
We shouldn't assume the knowledge level of the reader.
Examples become production all the time.
Using files with unix philosophy is a tried and tested way to be really productive.