There are so many horror films, they start to all look alike after a while. That doesn't really matter, because people will watch them. If something works in one film, you may as well use it to some degree in the next film. Check out some rules that horror movies follow that aren't necessarily obvious.
If horror movies had victim job fairs, they would feature only three occupations: photographer/media, fiction writer, and caretaker.
Booth number one would undoubtedly brag about Get Out's picture-taking protagonist, but the hard truth is that most people who pursue this career will end up being vivisected on grainy found footage. The Blair Witch Project, Paranormal Activity 3, [rec], Diary Of The Dead, Grave Encounters, The Visit, Willow Creek, and The Sacrament benefit from giving the people a realistic, documentary-related motivation for keeping those dumbass cameras rolling. Other times, it's simply to make them curious or to cause a good scare. The Ring's main character is a journalist so she will pursue the tape. In Shutter, the ghost shows up in photos, so naturally she haunts a photographer. Oddly enough, it doesn't even have to be a visual medium. Pontypool, The Fog, and Lords Of Salem all feature radio DJs and are great films.
It makes sense, though. Journalists and photographers can be anywhere at any time, and are looking for something interesting. Writers don't punch a clock, and seek solitude to do their work. Caretakers have a reason for being alone in a scary place. I don't know why DJs are in horror films, but some of them are really scary people. But that's just one trope that occurs in (almost) all horror movies, because producers will go with what's worked before. Read the rest of them at Cracked.