The instate public is often not affordable for low income students, @bluebayou . Only a handful of states meet need for all instate students - I live in a state that does not.
That said, the retention and grad rates for poorer students are much higher at elite colleges (public or private) than they are at most state schools.
Perhaps not, But if they are high performing students throughout K-12, they may in fact want to and if they do they are more likely to graduate.
^ they’re saying the college’s selectivity/resources/etc does matter.