Putting aside the game vs sport thought, I think golf is particularly challenging because it's so constantly changing...pinning it down in the past guarantees virtually nothing about a future task (shot, hole, round).
Wind, sun, heat, cold, body, mind, fitness, equipment, hole, hole location, distance of shot, style of shot, new techniques learned, abilities no longer available... EVERYTHING is in flux within the sport of golf, from round to round, from hole to hole.