That is pretty unlikely. Atlanta was originally built as a railroad terminus, and some such terminus was inevitably going to be built somewhere in the vicinity. The land on which Atlanta sits was chosen because of its favorable properties, it cuts (or did at the time) between two forests, and is about halfway between Montgomery and Charlotte. The surrounding land is highly arable. My people would have been happy to have accepted a land-use fee, which could easily have been accomodated within existing treaties.
On the other hand, reservations were located on land no one wanted. The land is not arable, has no or few mineral resources (or didn't at the time), and is generally crappy.
Saying that there's no reason Indians cannot be as prosperous as anyone else in America is kinda like the following. Suppose a monopoly game is going between friends, and then a gang busts in, throws the players off the table, shoots four out of the five, and then starts the game over. Once every property, utility, and railroad is owned and developed by this new gang, they invite the lone survivor back to the table, legislate that instead of $200 dollars he collects only $20, and then heckles him for not being as prosperous on the gameboard as they are after a few turns.
