The title has become a meme just like "... considered harmful".
Actually, it's a homage to "The Unreasonable Effectiveness of Recurrent Neural Networks" which is a homage to "The Unreasonable Effectiveness of Mathematics in the Natural Sciences".
Meme chains definitely are a progress compared to eponyms, but personally I hoped we would make a slightly bigger jump this time.
It would be better read in a way such as 'unreasonably surprising'