I do agree that the phrasing may be poor, but I see where ingav is coming from, if you're using hosted Wordpress and only keep your data in the Wordpress CMS, if Wordpress disappears today, so does all of your content. Although, that may seem foolish to some of us, there are definitely people out there who do that.
Yup. I'm using Vim + Hugo + GitHub + Netlify in a similar fashion. Just edit my markdown post, git push and it shows up on my website. I used some other static hosting service previously, don't even remember which one, but switching was super easy as I just pointed the output to some other bucket. So the public web hosting provider is completely commoditized and easy to switch from.
Also, I like treating my blog as a version-controlled, declarative "codebase" that's just a bunch of plaintext files (no MySQL tables, XML or JSON to crawl through).