I've explained it to myself like this: It's exactly like watching sports.

You want to watch it live on tv, even though the fact that you're watching has zero impact on the result. You're just watching other people play a game. You could do anything else and just check the scores afterwards, but still you want to watch it.

Some people will watch a recording of the game and still enjoy it even though the scores were determined hours ago.

The younger generation does the same thing, but instead of sports they watch someone play a game.

I don't understand either, but I can live with it =)