I don't know how many teenage programmers you have interacted with recently, but they are generally just learning the basics, learning core concepts, experimenting, etc...

There is a huge gap between making small, sometimes very cool and creative even, projects and understanding a giant legacy codebase in a language that is not taught anymore. I mean, even university grads often have trouble learning legacy code, much less in COBOL.

You wouldn't say your average teenage cook could make a gourmet meal for a house of 50 people 😅 not a dis, just they haven't had the time to get to greybeard level yet