Your frame of reference for this is incorrect. There are a finite number of interview slots, followed by a finite number of acceptances, for a finite number of seats supported by a flexible wait list. Each application is evaluated and scored/classified. These application scores are essentially your interview priority. With 5000+ applications at any individual school and only perhaps 1000 interview slots, 80% of applications must be rejected prior to II. Scoring and classification is continued in interviews, along with comments. Socially inept is actually a minor factor. Negative factors could be in inability to express or articulate in content or process characteristics that an interviewer is looking for to make a good physician. This doesnt mean that there is one kind of physician they are looking for or one set of attributes across all candidates. It is how you expressed your background, motivation, commitment, achievement, intellectual ability/curiosity, determination, empathy, interpersonal skills, etc. I may see a very service oriented person with a strong background working in marginalized populations along with a heavily research oriented candidate. Both may make outstanding physicians in different context. Both may show excellent ability or evidence in all areas. Both may score high by all interviewers. I may see very strong paper candidates who interview adequately. I may see less-solid paper candidates who interview fantastically.
After interviews, they may translate your interview performance into classification or scores and "add" it to your paper score. So you are fully evaluated before you are reviewed by adcom for acceptance decision. Perhaps a cutoff below a set number will get you recommended for rejected, a cutoff above a certain number will get you recommended for acceptance. the remaining middle set will get more discussion or review perhaps some will WL, others "held" for future reconsideration. Perhaps the adcom has a system where 75% present are required to admit or to reject. Later meetings will continually balance all this.
Let me also add that the only LCME requirement is that a defined adcom must approve a candidate for acceptance. As I said before 80% of applications are rejected pre II so in many ways this is negative process looking to eliminate candidates. This may continue thru interview where any individual interviewer may have policy to reject a candidate.
Lastly, the best way to look at this is an Olympic class competition. In the Decathlon which has 10 track and field events, while you have competitors next to you, you are looking to gain points. It is only at the end, with the tally of points, do you get a winner. Or perhaps in a downhill ski event where 20 outstanding skiers may go down the course, all were good, but only the top 3 get medals, maybe just by a fraction of a second