I think parent is referring to the habit of technically inclined folks of using "trivially" similar to words like "simply" and "just" [0][1] in a way that assumes too much about what the reader already knows.
Or maybe I'm trying to whet one's appetite for learning the thing by showing a relatively simple expression that demonstrates the power of the language.
[0] https://www.parkersoftware.com/blog/stop-using-simply-in-tec...
[1] https://news.ycombinator.com/item?id=35759449