Whether that makes the world worse is highly subjective. I don't believe things are objectively any more valuable just because they're public.

I have, however, seen a lot of bad patterns and code snippets copied and work their way into many codebases because one of the easiest ways to learn is to copy another source. I have seen people completely disown or neglect projects because it's "public", so what more do you want? I don't buy that these sorts of repositories are doing the world a favor and they increase the level of noise, helping drown out the good stuff.

But, hey, like I said if you add a pretty reasonable disclaimer to your README so the expectations are at least framed properly, I can get on board with that.