It's less that it's a pet political issue, and more that it's an example of how a core requirement of Amazon (strong public transit) simply isn't present in Atlanta. Amazon really depends on city services to fill in the gaps of their amenities, and quite frankly, real estate paid for parking spaces is real estate wasted by not being desks. You can see this in the design of their Seattle infrastructure, abd they've been explicit about these requirements in their requests for bids.
That the reason for the lack of usable public infrastructure for white collar workers in Atlanta is due to overt racism on the part of government officials is just the cherry on top.