If you are a photography buff and own a Nikon then Nikonians is the place for you - A vibrant community full of the entire range of people from experts to beginners all passionate about their topic and eager to share and talk about it.
All of these communities have one thing in common: They are full of conversation and knowledge. Each time I visit Nikonians I learn so much and come away feeling enriched.
None of these communities are on Facebook.
Pick a topic and try to find a vibrant group on Facebook for it. In fact, there doesn't even seem to be a way to find people who share your interests. And even if you could find them and 'friend' them, most of their Facebook posts will have nothing to do with your specific shared interest. Facebook used to have a Discussions tab you could add to a page. That function was removed a long time ago. In fact, Facebook is devoid of the structure necessary for people to gather around a common interest and focus on it.
Perhaps this is why so many people feel that Facebook is a waste of time.
The message here for small business owners is that you need to think carefully about what you are trying to accomplish with social media. Sometimes Facebook is the perfect tool. Sometimes it is not.