Author here. I didn't mention it because I wasn't writing an evaluation of fixtures. Just writing about how to make better use of fixtures. I actually use both fixtures and factories depending on the project specifics and also whether it is even my decision to make. :)
Personally, I even slightly prefer to use Factories and I also previously wrote about a better way to use them: https://radanskoric.com/articles/test-factories-principal-of...