I think the whole genre is nonsensical. In my mind there is no such thing as 'street photography'. It is simply photography Out In The World, and if you live with people, they will naturally appear in your photographs of your world. Is it 'street' to photograph a farmer on his tractor? Or is it only 'street' when the same farmer goes to the feed store in town? What if the store is in the city? These are all artificial categories where none need exist at all.
Street photography is taking pictures of people in public with little or no planning or in-depth story to tell. Documentary photography is taking photos with a set plan for a specific purpose -- to inform. These categories are helpful because the two systems are not the same thing.