Because this is how they spend their collective time and energy. This is what they think represents an important contribution to the conservative movement.
There's been lots of chatter since Election Day, especially in the press, about how conservative bloggers are going to seize the opportunity that the Obama win has presented them by finally fashioning together a serious, Internet-based politcal movement.
As long as they waste their time with projects like this, I don't think the netroots has much to worry about.