I get watching a movie; watching a television show; reading a book; listening record; or playing a video game. Sports on the other hand is like watching someone else watch a movie; watching someone else watch a television show; watching someone else listen to a record; or watching someone else play a video game.
I didn't start watching sports until I was like 15
Then I realized hey, these are the best guys going up against each other...I like watching people compete also...so that's why I started watching sports
Why do people watch anyone do anything that they could be doing themselves? Because it's fun dude. I can't speak for sports because I don't watch them, but the same way you'd rather watch someone run around chasing a ball in the rain instead of doing to yourself, I'd rather watch someone play a horror game so I can be less immersed and hopefully keep my pants dry. Same principle.