I encountered the same problem, where the person that answered the question did a great job with the answer, but the links were off. So I had to edit just 3 characters.
It was an old post, I believe no one ever fixed it because of the 6 characters limitation.
It seems rather counterproductive that in order to fix a small problem you have to look around to be able to add valuable information.
What if you are like me? I found that question because I was learning about the subject. How could I add valuable information to an answer that was already correct except for the links being off? (btw just 2 links were off, so the answer had enough information to be understood).
I understand that there are people that review the corrections, and minor changes, like correcting a typo that is easy to understand would be hard to review, but I don't know, maybe something should be done for special cases like the one I had with the links.