Because it’s not about you.
Just because you aren’t interested in a public transit project doesn’t mean society isn’t interested. If there are people who may want and/or need something like that, then they are the target customers for such a solution. That’s who it’s for.
Besides, you can’t just think of each little town or area as its own isolated system; nothing ever happens in a vacuum. Fuquay is growing at all as a function of the Triangle (esp. Raleigh)'s growth. Wake Forest is entering Raleigh’s gravitational field, and Fayetteville may eventually do so as well in some distant, better-connected future (if the state DoT has their way, anyways). This means more exchanges of people and jobs, new variables for development and change in the area, new trends for businesses or resident behavior patterns… you see what I mean, right?
If you want to truly be a responsible citizen, understand what’s going on, and stay ahead of the curve, then you need to understand. It doesn’t matter (and no one cares) if you don’t care -not because of any malicious reason, because someone else probably does care. And if you keep following that chain of cause and effect, there’s a good chance you lead back to something you do care about, in a way you don’t expect.
After all, isn’t that what we’re here on this site to talk about at the end of the day?
PS: speaking of people who’d care about a regional rail link (totally on board with the idea by @orulz and @Nickster’s Fayetteville extension btw), what would it take to do a traffic/demand analysis about that? and would that help make a better case for building a rail system? …because, at least to me, a lot of traffic analyses in today’s white papers seem oversimplified and off.