Every one of your listed false predictions held within it an inherently great value to prove wrong, a value so enormous and ungodly that anywhere from thousands to billions of spirited men and women pushed everything else in their lives aside for that one cause. They made that choice to give their lives singular purpose because the importance of the goals they pursued necessitated nothing less, and what they knew to be potentially massive benefit to all mankind outweighed everything else in their lives.<p>This goal of millions of speakers of Lojban would require that same monumental level of collective human effort and perseverance, but it does not necessitate anything of that kind to anyone, nor will it ever, because the potential benefit to mankind is just that marginal.