I don't necessarily disagree with most of what else you say in the blog post, but if this is seriously your conception of how people use dating sites, then you are doomed to fail.
Speaking from the experience of living with various roommates who have done e-dating with the popular services, none of them have ever approached them in this mechanical way. The data helps refine the search, but they're still looking for attractive people to chat with.
And that data part is important. If you're a 20-year-old looking to have fun, you're going to want to weed out anyone who is in an age demographic that wants to have a life-long relationship. And vice versa. So not having that data is a disadvantage that you have to make up for.