Programmers already spend about as-much of their time, if not more, reading other's code as they do writing their own. It doesn't mater if that "other's code" is AI generated or not.
There's an argument to be made about excessive vs not-enough commenting, but that's not where you went, and its clear you have negligible programming experience, or creative experience for that matter, to be coming after the concept of sharing code like-so.
One wonders how many books you've read, to be pretending that reading a book without paying for it, even borrowing from a library, is theft. Stick with the environmental costs arguments - its what you are personally suited to argue, and far more urgent than the rest.