I actually tested this theory recently; when I went to Machu Picchu, I took several pictures with my wife in them, and absolutely zero pics of the scenery or the monument. When I got home, I inserted some random high-res professional pics from recognizable vantage points into an album and called it a day. I don't feel shortchanged.

Although I'm somewhat glad for the tourist "gotta take my own shitty photo" attitude, because I saw a really nifty research project once that took thousands of tourist photos (of the Trevi Fountain IIRC) and combined them to generate a high-res 3d image without any people in it. That was pretty cool.

If I could change anything about my Machu Picchu experience, though, it would have been to find some way to shut up that blathering loudmouth moron in front of me who barely paused for breath for the entire duration of the morning hike to the nearby summit. Jesus christ lady, I couldn't hear a single nature sound, and I did NOT need to know about what a slut your cousin is.