You'd think if the Tier 1 standards were that much better they would kick out much more students than a bad school.
Why would students that could choose to go to any school choose a hypothetical "top" school with 10% forced attrition over another "top" school with no forced attrition?
Also, suppose that forced attrition means the school is essentially telling a student they are not capable of becoming a good lawyer, at least their their current effort level. Now, why would it make sense for the same number of "top" students (so defined by high GPA and LSAT) to be told they couldn't make good lawyers as would be the case at schools with less "elite" students?
It makes sense to me that everyone at YLS, with a high undergrad GPA and a 99th percentile LSAT will make a good lawyer. And thus, it wouldn't make sense for such a school to have any forced attrition.