I know it's hormnoal, BUT puberty gyno seems to go away on it's own after a few months, so it seems that the formation isn't permanent, unless the structure of forming tissue is diferrent in the two cases, to wich i have no clue. So the point really is weaher a pefrfectly healthy body would be working on eliminating it or just wouldn't see it as a disorder and thus wouldn't give a damn.
As for hair, i'm feeling confident it will help, but i don't think it alone will solve the problem. Acctualy i'm certain it won't.