Imagine if, in the United States, about ⅔ of state universities started after 12th grade (as they do in reality), but ⅓ of them enrolled students after 11th grade instead. If you finished 12th grade in high school, you give up any opportunity to one of those. Say… the University of Virginia system admitted 11th graders (and never 12th grade graduates), while Maryland and North Carolina took high school graduates.
The university comparison was a bit hard to follow. But the overall discussion is interesting. It's hard to imagine what kind of person wouldn't agree that this is a problem. As for how it can be solved, yikes. Good luck.