How does 20K to replicate code available in the thousands online (toy C compilers) prove anything? It requires a bunch of caveats about things that don't work,

How does 20K to replicate code available in the thousands online (toy C compilers) prove anything? It requires a bunch of caveats about things that don't work, it requires a bunch of other tools to do stuff, and an experienced developer had to guide it pretty heavily to even get that lackluster result.