It has little to do with that and more to do with how "Democrat" has become synonymous with "urbanite who is trying to ruin your way of life".
Until 2014 there were a lot of rural white people in Iowa, Minnesota, and Wisconsin that voted Democrat. Facebook in particular has convinced rural people that every Democratic politician wants to force them to drive electric vehicles, take their guns, mutilate their childrens' genitals, and make everyone "woke". Minnesota and Wisconsin are urban enough that they vote Democrat, but Iowa essentially became the last state outside of New England, to be A) Predominantly rural and B) still voting Democrat. Now it's been a decade of near complete Republican stranglehold and the only hope in sight is that eventually the growth in Des Moines and the Cedar Rapids/Iowa City overtakes rural Iowa enough to get a Democrat back in office here.
Iowa's culturally more Great Plains than Great Lakes/Rust Belt, and has finally started voting that way. Of course, the rural areas of Minnesota and Wisconsin vote the same way Iowa does, they just comprise less of their respective state populations.