We had a maths teacher (Jack M......) who instilled fear and he had at least the same rules... just unwritten, you were expected to know! He was basically “Chalky” from the Giles cartoons. I remember pissing him off so much one day, that he dragged me, hopping and jumping to keep up, out of the classroom by my hair! Ahhh, the good old days...
Obviously with more testing more people are positive with covid. If we had more IQ tests we'd have more idiots, too.
Not sure about your second sentence, Vulpes. We'd have the same number of idiots as at present, but we would just have identified more of them. And I can think of people with a high IQ who are still idiots. (Naming no names...)