When Machine Learning meets Human problems

I've never seen robots or AI as an evil job replacing or apocalypse causing fear monger. Rather robots or AI in this instance can help people solve grandiose problems. For instance, we have been using machine learning to play games, answer questions, perform data entry, optimize businesses, fly drones etc. Yet why haven't we used the same technology to solve a few very simple problems: keep robots standing up, improve robotic dexterity, and improve the dexterity of exoskeletal limbs? It isn't that humans aren't intelligent enough, it's just that machines are more precise, never get bored, or lose focus.