I take not mentioning hypermedia in a post discussing REST as a huge red flag. The author mentions Roy Fielding's dissertation, but apparenly they didn't read it thoroughly.
Furthermore, I believe that a huge confusion comes from not understanding what a "resource" is: it is not a database table*; it is not your domain model*; it is a _representation of state_. Like this very orange page you're looking at. This whole page is the resource identified by https://news.ycombinator.com/item?id=35014395. Just like the stylesheet for this website is a resource identified by https://news.ycombinator.com/news.css.
* It may be, if that's the _representation_ you want.
Furthermore, I believe that a huge confusion comes from not understanding what a "resource" is: it is not a database table*; it is not your domain model*; it is a _representation of state_. Like this very orange page you're looking at. This whole page is the resource identified by https://news.ycombinator.com/item?id=35014395. Just like the stylesheet for this website is a resource identified by https://news.ycombinator.com/news.css.
* It may be, if that's the _representation_ you want.