I don't know why I didn't saw this post earlier.
I also don't see a need of moderators for this forum. Mainly because it isn't active. But I do think that it lost public interest because there are no moderators. If I good remember, moderators were the one that kept the forums alive and going. It also created a sense of competition for others to become a moderator. And people would post on forums more if they were to expect a response from the "Staff", that includes moderators too. But since you're the only one to respond, and like you said, you don't always respond, that doesn't leave any interest for users to post here. So it makes it easier for you to moderate by yourself, that's why you don't feel a need of them.