So at around 13 I'd say that I was about the only one of my 30-ish classmates that was actually producing something that resembled working code. I coded a whole functional (but simple) sprite editor in QBASIC that could write PCX files.
But honestly, that code was complete crap. I was barely figuring out what functions were good for, because most of that was being self-taught by reading the manual and trial and error. And compared to my classmates that was top 1% stuff.
Nobody actually wants stuff like that for any serious purpose. No company wants that code, or being saddled with a few dozen teenagers, some of which are completely useless. And that goes for all fields. Who out there needs a human to do trigonometry these days? What about history, or literature? What does production there look like? Do we grade them based on likes and reviews on fanfiction.net?