Very much like the high-def black and white landscape. With respect to the white van it seems to me best to leave it in. Why? The answer I believe lies in the story the photo tells. What is the subject or focal point of the capture? It is not the foreground people, nor the boat, nor the tower, nor the town, nor the mountains, nor the sky, etc. The subject of the photo is that it is a landscape. And, as a landscape includes all that it captures. My question is this: what is photographic integrity? I realize that is a big one. To me this capture captures a scene as it ordinarily is. The photographer captures it in b/w and ups the tones in editing. But, that does not actually alter what is in fact there. While the van may be visually inconsistant in the scene it seems to me that it is as important as the rest of the elements; it is part of the photo's story.
Alas, you are the artist (s). And, I but a failed novice. So whom am I to question.