Startups excel at tool-making. Building better mousetraps is often seen as purely destructive to jobs, but it also creates jobs like crazy when a formerly-unavailable tool suddenly becomes available and lower-priced demand can be satisfied. The availability bias works against us here because although it's easy to see that robotic factories destroy textile-worker jobs, it's hard to realize that cheaper computer costs will mean companies won't mind hiring for data entry, as now they only have to pay $400 a box as opposed to $1 million for a mainframe.
In terms of creating jobs, the most saintly of tech people are probably the UX designers who can take something a layman normally couldn't grasp, and put it within their reach. Solar panels don't create jobs for the uneducated. Solar panels so easy to install that you can hire minimum wage workers to install them DO create jobs for the uneducated.
For whatever reasons, startups have not had similar success with education. But this will undoubtedly be a hot space for the next few years, because though the growing divide isn't the Valley's "fault," modern education is a real problem and needs addressing.
Startups, you want to create jobs while still making a killing? Take something hard and make it easy, or take clueless people and make them smart.