You don't get full ride scholarships to Stanford. The entire mens team splits four scholarships between everyone. The only way you go there for free is if your parents are poor and you are on financial aid.
Sarah Robinson goes to Gunn High School, where all the Stanford profs' kids and Silicon Valley millionaires' brats go (if they even go to public school). It has the highest suicide rate in the nation of any secondary institution, including 4-5 deaths via kids jumping in front of CalTrain in one year. A lot of kids there are great at a lot of things (pressure, immense resources). She probably thinks nothing of getting 4th at Footlocker West because it just doesn't seem that out of the ordinary.
BUT...being top 40 in the nation in xc is a lot better than being on the US U17 soccer team, which doesn't include all ages and is really subjective anyway. The girl is built like a runner--stick thin. Does she really think she can make it as a soccer player? Also, it is really unfair to take away a spot to San Diego from somebody else.