An app like the one the author of the article is talking about doesn't need "extraordinary" coders. The reason for the crash was that someone entered invalid data. That is a very simple, and very common, problem that you only start to understand with a bit of experience. You don't need to be a brilliant genius to understand it. Literally every dev whose worked on a few apps can deal with it. But you do need to have worked with real QAs and real customers in order to understand that people do stupid things that you need to protect against. No one is teaching that in a compsci class. Juniors learn that from seniors. If you have no seniors, demos failing on "obvious" things is exactly what happens.