Its useful to have an outsider to look at this thing from a different perspective but they still need to be at about same level. It's extremely rare to have an unrelated genius, %99.9 of the time the the outsiders are people who didn't go through the basics that a homogeneous group went through and they just do a speed run on the basic ideas that everybody first though but didn't work. Still shouldn't be dismissive, has its place when the established understanding strayed away from reality but its not possible to base all the discussion on such a composition.