The good news is it's just a short matter of time until far more entrepreneurs begin chasing the larger problems you describe. Once these more ambitious ideas have one or two XX billion dollar wins, the leaders of those companies will replace the Zuck and Dorsey as aspirational figures and both funding and talent will spill in. Musk is doing this as we speak, and there is room for another. If you look at the timescale this is all happening, it shouldn't be so depressing. It just feels slow because you're on the inside.