Most "REST" APIs are just RPC. Many "REST" URLs are just the names of the methods they call on the remote endpoint.

REST is good for things like downloading and uploading documents or media to a web server. GET, PUT, POST, DELETE, etc. were designed for documents/media. Because it's available from a web browser, like JavaScript, people started using it even on native apps because it's familiar. That doesn't mean it's the best or most productive protocol.