Spot on. RESTful URLs are not to be treated like SEO URLs. But unfortunately most people don't see the difference. One example in the article is especially harmful (/students/<id>/courses/physics for querying).
Most web apps (outside of websites themselves, which are a kind of very simple application) aren't HATEOAS, so Roy's thesis has less purchase on their design.
The single best slideshare I've found on REST is Teach a Dog to REST. Old but gold. https://www.slideshare.net/landlessness/teach-a-dog-to-rest
(And a shameful plug - https://medium.com/@rdsubhas/pitiful-restful-urls-5d576ffccb...)