Inevitably I draw on my own relationships when I write, so if I'm writing about a fight between a husband and his wife, of course I'm going to think about a recent fight with my husband. Or if I'm writing about sisters, of course I'm going to think about my sister.
The television industry doesn't like to see the compexity of the world. It prefers simple reporting, with simple ideas: this is white, that's black; this is good, that's bad.