I feel like Aslan when you quote wowpedia to me
Yeah I know the guy that wrote that page. Even meet him at Blizzcon.
He's the author of Master Plan and other brilliant addons.
He does not work for Blizzard so that's not official documentation. The command you are talking over never existed before 2018 - I was in the Addon IRC and Discord when it was discovered.
While it's a brilliantly useful command I have to note it wasn't around when the wow addon community started. Addon authors pretty much had to forge their own paths to forging addon documentation as very little was given out officially by Blizzard.