In this case, greed.
The Rock Cats were a perfectly fine AA baseball team in a pleasant and fun stadium in New Britain. Then, a collection of easy-money greedheads in both baseball and Hartford government cooked up this scheme and, lo, another financial burden is to be laid upon the shoulders of mostly-middle class and poor of Hartford.
Smooth move, guys. Here's a fun quote: "The city is going to be on the hook for most of it," Garcia said. "The city is responsible for most of the damage."