Web apps are cheap to build, easy to learn how to build, fall into a predictable model for investors, and are equipped with lots of social institutions (like YC

Web apps are cheap to build, easy to learn how to build, fall into a predictable model for investors, and are equipped with lots of social institutions (like YC) encouraging people to build web startups. So, all things being equal, we should expect more people to be creating web apps (compared to other kinds of technology) than their profitability or social value would warrant. Framing makes a big difference. If there were an established culture and set of resources for engineering or biomedical startups, they might seem less daunting.