Unless the point is to have more people in regardless of whether they have any possibility to graduate I don't understand this. How many highly talented kids have already been lost just because they didn't know what they wanted in life at 15 and thus have much lower high school grades and sat scores and whatnot than what they are actually capable of?
This isn't an admissions criteria. This is just a commitment to helping kids that come in with weaker backgrounds get up to speed faster, without having to spend credits on remedial classes.