Because we're just that stupid. They're already stripping down college criteria in similar fashion. Grade schools are passing kids that are 2-3 grades below their grade levels. Now we have "tests are racist." Maybe the tests are racist because math and science are racist; I'm sure I'm not the first person to say that, but at least I'm being sarcastic...
They've been stripping spending for children with mental/behavioral issues for decades and now for the most part they're just placed in public schools with little to no support and causing distraction for the children without those disabilities so everybody can suffer equally. We have all these no tolerance anti-bullying policies to stop school violence (namely shooting), which has completely failed, so we get even stricter with the policies. I could go on and on, but the point is we keep doing stupid shyt when it comes to education, what makes you think we're not capable of doing something that stupid?