The reality is both programmers and doctors have a highly technical skill. A high school can build an "app", but they likely don't have the depth of knowledge to build it properly and reliably.

The same goes with medicine. A nurse, WebMD, or other resource might get you the correct answer, but that's not really the name of the game. Medicine is about both getting things right and not getting things wrong. It's easy to teach the first, it's very hard to get the second.