My grandparents tend to watch a lot of reality TV. On the History Channel, Discovery Channel, all the channels that used to have interesting, educational content like documentaries.

I've noticed it's the same kind of show (mostly): someone lives in a harsh environment or otherwise away from civilization.

I think they're...living vicariously through it? They love the outdoors, hunting and fishing, etc. They are a bit too old and tired day-to-day to go and do the things they always have loved, but they get something out of watching others brave the elements.