I agree that SLE would be a valuable experience for a potential candidate. However, based upon statistical data and feedback from others on this forum, it is clear that attending SLE would not increase her chances of getting an appointment. It is a recruiting tool. Many candidates who get appointments don't attend SLE, and many candidates who attend SLE don't get appointments.
In littlepatriot's defense, it is obvious that she has weighed her options, and to her, it makes more sense to support her teammates. I applaud this decision. Isn't that what we expect in WP cadets and in our military officers: loyalty, self-sacrifice, judgment, and dedication???
I don't think her chances of getting a BFE would be at all diminished if she doesn't attend SLE. Godspeed to you!