Did you and I read the same book? Most of this story is occurring in the Rust Belt[0], in Middletown, Ohio[1]. He discusses the mass Appalachian flight into Rust Belt towns and the mixing and clashing of culture.
If anything, I'm glad the author kept things largely, as the subtitle would imply, a memoir of sorts. He focuses on his family history and his life to give a face to the problem, but makes you aware that these are major problems in that community. From there you can draw your own comparison based on your experiences.
As someone who lives in one of those cities, it seemed like a clear correlation could have been made. It was chance to unite a rural and an urban problem across race and I thought it was a missed opportunity. I still enjoyed the book, but think it is even more powerful when read in tandem with a book like Evicted [1] that views the problem from another perspective.
[1] https://www.amazon.com/Evicted-Poverty-Profit-American-City/...