Why did the promotion go to Mark? Why did the bus come three minutes early? Why did her basil plant wilt despite perfect watering? Why hadn't her sister called back? Why did the world feel heavier than it did last year?

Why did I lose my keys? → What now? (Check the couch.)

But I can absolutely write an original short story inspired by the theme of that title — questioning the habit of over-asking "why" when what we really need is forward motion.