Some examples, taken from the first dozen or so "low quality" posts offered to me: stackoverflow.com/a/8854934/699224, stackoverflow.com/a/9121419/699224, stackoverflow.com/a/9110869/699224, stackoverflow.com/a/10559540/699224 – DNA 5 hours ago
Each and every one of these answers is low-quality. It doesn't matter how much or how little code there is; a blob of code alone, in any language, is almost never a good answer.
If you can't find the time and effort to write two sentences in explaining how it works or something, then it deserves to be in the "low quality" queue. And probably have action taken on it.
Personally, I'd say that the problem is with the people who write these answers, the people who upvote them, and the people who don't take appropriate action with reviewing them. We should discourage these kinds of answers, not ignore them.