1993. High school parking lots, headphones, closed bedroom doors—Smashing Pumpkins were everywhere the disaffected youth needed them. Notebooks bore the long, skinny heart logo and guitar teachers taught simple, memorable songs like “Disarm” and “Today” to students begging to impress friends at bon fires. Torsos that once advertised Iron Maiden and Metallica now flaunted Siamese Dream as the new heavy. No need to follow the Pumpkins’ career through the 90s into the 21st century—it’s been told a...