For decades the teachers have promoted bringing higher achievers down to the middle so as not to make the low achievers feel uncomfortable.
Society lost some good people who grew up without encouragement and opportunities——such as boys who raised their hands in class but never got called on by the sexist feminist women teachers pushing female empowerment.
This is because most teachers were/are lower achievers.
My middle son experienced that BS. He brought home papers "corrected" by his teachers. There was glaring incompetence on the part of those teachers. I reviewed the papers and showed him the actual errors so he could do it right in spite of the teachers. He finished high school with a 4.33 GPA including multiple AP courses where he presented course material the teacher assigned didn't understand and achieved the perfect "5" scores on the AP exams.