noble Yes, that is the point indeed!
The problem was that with the abandonment of the GCE/ CSE split into GCSE, all abilities were catered for under 1 exam.
When the GCSE was first introduced, it was quite common for many students to gain grades D-G - these tended to be the CSE type of student.
When targets and league tables became the focus rather than quality of learning and materials used, the boards ( who are a business, let's not forget, touting for business!) started to include texts that were easier for less able students and also set questions that were easier.
The whole value of GCSEs have been eroded over the years. When I began teaching, the minimum qualification required for teacher training colleges was 5 O levels, or a degree for a PGCE course.
5 O levels was the entry point for many professions and replaced the former School Certificate.
It seems almost laughable now that 5 Cs at GCSE would qualify anyone for anything but this only goes to show how their value has decreased over the years, not because humans are becoming more intelligent, or teachers are doing a marvellous job compared to previous generations of teachers, but because the exams have been dumbed down.