Gates is doing great work, no doubt. But are they "hard" problems to solve? Most of the projects Gates takes on have already been solved in the developed worl

Gates is doing great work, no doubt. But are they "hard" problems to solve? Most of the projects Gates takes on have already been solved in the developed world. He's primarily trying to distribute those successes to the developing world. In any case, we can have both: rich people building the tech of tomorrow, and rich people trying to apply existing tech to the underserved. Both are good; both have utility.