Yeah, that's the HN "anti-clickbait" feature that (amongst others) removes the "How" from titles like "How we managed to run Doom on a mechanical typewriter", but in this case it doesn't make sense at all...
It removes repetition and imitation. To avoid a frontpage list full of "why I rewrote ___ in rust" , ,"how I use rust for filing my taxes", "how I switched from braille to rust"