We don't have a national curriculumn. If you start requiring college level general education from high school students, you're biasing selection against kids whose schools can't or won't provide those classes. There's no way to force local schools to change without a major overhaul of our entire system.

We don't do that in the United States for any other undergraduate professional degrees. Engineers, accountants, pharmacists, nurses, teachers etc... all require college level general education.

Eliminating that is not realistic.