The admissions office says SS does not impact your AFA application.
That being said, SS has competitive admissions so the fact that your DS was accepted means he is a competitive applicant.
Our DS found it helpful to meet the admissions counselors- some of what they said impacted his choices for the rest of the summer (i.e. he decided to take the SAT one more time to boost his math score). Also he kept a journal and wrote about some SS experiences in one of his essays. He came back convinced AFA was THE place for him, which probably came through in his essays and interviews.
He did get a '22 appointment. Good luck to your DS!
The first sentence is true; they say it & I believe they mean it. As to competitive applicants, there are plenty of cadets that didn't get into/didn't apply to SS but are now cadets. Thirdly, the information the admissions counselors gave your son is also found in the Advice to Candidates section on the USAFA Admissions website. USAFA superscores so take as many tests as possible, and they're plenty of threads about SAT/ACT prep here. Also your ALO can advise. SS seemed to answer the questions (if he had any) as to whether your DS wanted to attend. You think SS got him in? Maybe...maybe he would've gotten in anyway...maybe your congressional district is underrepresented at USAFA...maybe he fits the diversity definition USAFA has....maybe...etc...Bottom line: Either you believe Admissions about SS or you think they aren't telling the truth (i.e. lying), so you don't.