Are selective schools overrepresented, or are nonselective schools underrepresented? I don't think these two ideas are the same, because I think there is room for discussion about both.
Also, the article seems to imply that discussing selective institutions on a national stage is like discussing which Ferrari to purchase at a soup kitchen, but in reality, so few students attend selective institutions because theyre selective. A significantly larger number apply and are waiting for those decision letters, even if they recognize that it will almost certainly be a rejection. In the grand scheme of things this point doesn't really matter, but it was something I noticed.
*Disclosure: I attend a large, public research university