Assuming this method pans out as a cure for AIDS... what starts out today as a solution for those with money causes interest in making it more widely available. Interest leads to new techniques for reducing the cost and complication of bone marrow transplants. Reducing the complication and cost of bone marrow transplants spills over to benefit many other ill people.

Best of all, curing AIDS with any method whatsoever will likely lead to discoveries about the very nature of the disease that could obviate the need for a full marrow transplant.