The pool of qualified applicants is not as deep as you think. I am doing a lot of college recruiting interviews and students at Harvard, MIT, Berkley are pretty

The pool of qualified applicants is not as deep as you think. I am doing a lot of college recruiting interviews and students at Harvard, MIT, Berkley are pretty good but the quality goes down very quickly after top 10. We consistently make offers to ~50% of students from MIT but only to 10%-15% of students from top 20-30 university.