And the cities surrounding Detroit have a lot less problems than the city itself.
The hundreds of thousands of people in the area with technical educations aren't working at McDonald's.
That very well might be true, but that's Detroit's problem to fix, not Amazon's. Amazon doesn't want to have to deal with that; they want a place that they can get people to come to day 1.
The Detroit bid put together by Dan Gilbert and team highlighted the fact that almost 50 million people live within a 5 hour drive of the city, with a huge collection of major research universities. Another big push or two like Amazon HQ2 can provide, and I think the city and metro area become highly attractive as an economic destination like Chicago dominates today in the same region.