Is realistic apocalyptic fiction interesting?

You all know "The Road" by Cormac McCarthy, which presents a realistic view of the apocalypse, featuring looting, gangs fighting for survival, and the everyday struggle with violence, along with a lack of food and water. Personally, I believe this is a reality we may face at some point.

I’ve started writing a book on this topic with the goal of exploring it from a family perspective. I want to describe the stories of different people before and after the apocalypse. Would this be interesting to read? I'm struggling to find motivation, as my girlfriend says this is a topic that no one writes about, so she thinks it's a stupid idea.

Also, do you know any similar realistic apocalyptic books like “The Road”?