The first time Bill Walton says “I’m the luckiest guy in the world,” he’s sitting by a river in his home state of Oregon, wearing a kaleidoscopic tie-dye T-shirt, and grinning from ear to ear. Aside from the brief video that precedes his oft-repeated tagline — a montage which hints at the disastrous injuries Walton sustained as a professional basketball player and the controversy he stirred as a Vietnam War protester — it’s easy to believe him.