Malcom Gladwell (in my humble opinion) is very good at making political arguments, not scientist arguments. They sound true. They engage in intellectual and emotional ways.
I have, with multiple Gladwell books, been led down the garden path. But golly it's a pretty and enjoyable walk. And eventually that walk leads me to other interesting stuff, like _thinking fast and slow_.
I guess, it's useful to me to read stories dressed up as science (kinda). Otherwise, how could I tell if the science I'm reading is just a story?