The Internet was done so well that most people think of it as a natural resource like the Pacific Ocean, rather than something that was man-made. When was the last time a technology with a scale like that was so error-free? The Web, in comparison, is a joke. The Web was done by amateurs.
The secret to building large apps is never build large apps. Break your applications into small pieces. Then, assemble those testable, bite-sized pieces into your big application.
Increasingly, people seem to interpret complexity as sophistication, which is baffling - the incomprehensible should cause suspicion, not admiration. Possibly this results from the mistaken belief that using a mysterious device confers [extra] power on the user.