"It’s true that in using a language like Elm for layout, one loses the ability to cut and paste random CSS found on Stack Overflow in cargo-cult fashion without understanding what it does. I consider this limitation a feature."
It could have been worded better, but if you consider that people will do this copy-paste out of frustration with the inability of CSS to come up with a reliable, easy to use way of doing layout, which Elm solves, then it's not entirely unreasonable.
Wow, elitist much?