Having grown up in that area of the Midwest, I largely agree with the author's categorization, except that "people on their way to somewhere better who got tired and decided this was good enough" describes a LOT of the midwest, not just Indiana. Significant chunks of Michigan, Ohio, and Missouri, most of Iowa/Kansas/Nebraska, etc.
If you read the history of westward expansion, "got tired and decided this was good enough" is literally true for how much of the area got initially settled (by white people)
Spend some time not just driving through them, and one may be surprised to find plenty of diverse and interesting people that live full lives with rich family and social bonds, reasonably priced housing, ample winter outdoor activities (a lot of people actually want snow because it's beautiful and you can do fun things with it) and plenty of nearby nature and recreation opportunities, which I would contrast less unfavorably than the zeitgeist against the crowded, expensive vagrant culture that tends to dominate the more popular places on earth.
I would argue that this could also be said to people (mainly from more rural parts of the US) who like to disparage large cities. If we're going to lecture city dwellers about how they talk about places like Indiana, maybe it's worth encouraging Hoosiers to go east or west and experience the vibrant neighborhoods and offerings of large coastal cities rather than just assuming they're cesspools of crime and poverty just because they heard a politician say places like Portland, Oregon, are "war ravaged"