If I'm trying to find a subreddit for my niche, I will instantly find it by searching for [niche topic] + "subreddit" on a search engine. This on the other han

If I'm trying to find a subreddit for my niche, I will instantly find it by searching for [niche topic] + "subreddit" on a search engine. This on the other hand is useful for finding a subreddit for literally anything else, things I wouldn't expect to have a subreddit, but definitely not niches. The first 20 subreddits under every category represent anything but a niche, because they are listed by popularity. By definition I need to click the last page of each category to "find a niche" but it definitely won't be my niche. What was the reasoning behind the tagline?