You say that, and I also ask that question. AND YET the Thai government has reforested HUGE areas (millions of acres) dropping seeds into previously logged and difficult to access areas. It is the nature of seeds that a flower produces hundreds in the hope of the one reaching maturity. The technique has been used for almost 10 years here with great results, although they do it slightly differently, and make little "seed bombs" first.
The results ARE impressive.