He explained why recently on Twitter https://twitter.com/danluu/status/1521583578856902656

Obviously Dan Luu should format his own stuff exactly the way he wants but I can't say I follow this explanation at all. It seems to be something about people jumping to iffy conclusions based on the dates and commenting about it online? Some people jump to iffy conclusions in general and comment about it online. The solution of annoying everyone because of a minority of annoying people feels like a net increase in annoyance.