But there is! It's called "Not-that-active subreddits".
A post at -1 from yesterday, in a subreddit with only 1 post a day, is completely deserving of being on the front page of that sub (top 30) posts. If all negative ones are banished from the top... that's very bad.
By definition, not many people use any particular minimal-activity subreddit. There are a lot of subreddits. It's certainly possible many people use at least one minimal-activity subreddit.
A post at -1 from yesterday, in a subreddit with only 1 post a day, is completely deserving of being on the front page of that sub (top 30) posts. If all negative ones are banished from the top... that's very bad.