I think it’s fine to read, in about the same way that pulp sci-fi novels or “chick lit” are fine to read, or sit-coms are fine to watch: Gladwell is a good storyteller, and has loads of amusing anecdotes. As long as you don’t take things too seriously, or start to confuse his banal generalities for insightful modes of understanding, it’s a breezy, not too mentally taxing, way to spend an afternoon.