I understand what you mean, but I don't think being anonymous necessarily means there is no sense of community or subculture.
People have different levels of comfort when it comes to privacy. Some members are happy to register and share more about themselves, while others simply prefer to remain anonymous or browse without creating an account. That doesn't necessarily mean they are less interested in the community.
For some people, privacy is simply important. They may want to participate, read discussions, or occasionally contribute without having their identity, profile, or activity tied to them permanently.
I think there is room for both. Those who want to be more involved and identifiable can do so, while those who prefer to remain private should also be able to participate without being pressured to reveal more than they're comfortable with.
A community doesn't have to mean everyone knows who everyone is. Sometimes it's simply people with a shared interest coming together, even if some choose to keep their identity private.