I'd agree, it's the ubiquity of digital cameras, plus social media making it normal/expected that people will post photos from a trip.

In the past photos were mainly for your own use and you'd talk to people about your trip. Now photos are how people tell each other about what they're doing and where they are. As social media has become competitive for many people that compounds the effect.

When I was travelling around SE Asia twenty years ago with a film SLR I was a novelty. At a viewpoint most tourists would take one photo with a point and shoot and I'd take perhaps 2 or 3. The rest of the time was spent looking & exploring.