Brilliant and working as a cashier at Walmart do not go hand in hand in my book..did she go to college? Was she going to classes to further her education?
Sara is 18. Contrary to popular belief, one doesn't NEED to begin college immediately upon graduation from high school. In fact, I don't have any qualms about saying that most people would be better off waiting a while. At 18, you're a child. You have no idea what you want to do with your life, but you're absolutely certain of what you are
going to do with it, which is a dangerous combination.
I'm in my mid-twenties, and a lot of my peers (including myself) who started college at 18 really wasted time and money goofing around as undergrads. It took me until I was around 25 before I had any idea what I wanted to do, and by then, I had an irrelevant bachelor's degree from a university I would not choose if I had to do it over, five figure student loan debt (puke), and no relevant work or life experience. I am an intelligent person, but going to college at 18 was pretty much the dumbest thing I've ever done, and I've done plenty of dumb stuff. For me, the most striking lesson of adulthood is that nobody cares how brilliant you are - people care that you are capable of making rational and well-considered choices.
I'm not dismissing the value of a degree for the sake of having a degree. No doubt, it is an advantage. However, I feel that the vast majority of people would be better served by waiting to get one until they've done some exploring, contemplation, and growing up. I've had to basically start from scratch in order to pursue my career of choice, and will likely need to go back to school anyway for more undergraduate coursework before I feel okay about applying to grad school.
I have a handful of friends who waited and without exception, all of them are both brilliant AND successful. Also without exception, all of them have worked unglamorous, menial jobs before choosing to go back to school. I admire that far, far more than I do anyone who just goes to university at 18 because that is what is expected.