I have two DCs, who went to the local comprehensive. Both got all As and A*s in their GCSEs, and AAB at A level to get into the RG university course of their choice. They both got firsts. DS didn’t want to go to Oxbridge and I don’t think DD2 could have coped with the pressure.
Apart from the fact, they could both have got AAA at A level, I don’t know how they could have shone any brighter? DS is earning 6 figures in a profession, where nobody cares about your A level or degree results - all anyone cares about is that DS passed the professional exams.
However, especially with DD2, I got sick of the pushing by teachers, who never cared about DD2’s well being, except one. All I heard from teachers from Year 10 onwards, which was in fact directed at DD2
”All you have to do to get an A/A* is….”
Even when I asked them to leave DD2 alone, because as a high achieving perfectionist girl, she put enough pressure on herself, and she certainly didn’t need any more - with an early history of an eating disorder already. Did they take any notice - no, they didn’t. As a ND girl, who had no support from the school, she was burnt out by the end of secondary education.
I simply don’t recognise what OP is talking about, in the comprehensives round here, nor our own secondary education at grammar schools in the 70s. Boys got the cane at my school, so disruption never lasted long in classrooms.