To be fair, that’s only how I understood it from the articles mentioned and some hours on Google.
If you use these top category tags, you’ll have higher chances to get curated. My article "misconceptions of competition vs community" was tagged as business and education, two very popular tags. It may not fit well enough into either, but I thought "close enough". And the article got curated for "Work" and "Self". So it looks like a win 😁