Some of the 93 percent may do, but logically, not remotely most of them - because Warwick and Imperial are very hard to get into too. And their courses are different!
One of the important things here, though, is the suitability of the student for a specific type of course. If lots of students apply who want to do computer science, because they have taken computer science at A-level and think it’s an IT/software course because they haven’t really researched the course and what it contains, and aren’t actually very suited for it, why do you think Cambridge should take them?
One of the big flaws in education in policy has been in fact to treat education like a market, and intelligence like a plastic quality that you just plug in to whatever “supply and demand” you want for the economy (eg. just get the brighter students in the education system to do more STEM A-levels and degrees, expand capacity, and bingo! Jobs are solved!)
Whereas, as we all know, people have specific abilities and talents. Some have a natural aptitude for languages, or maths, or music, and others less so. A few kids are lucky all-rounders who can do well in several subjects. But education policy over the last fifteen years has pretended that aptitude doesn’t matter - that you just get schools to churn out STEM or social science students and universities to churn out STEM
graduates instead of other courses, and that solves all economic problems. The idea is that you tell the classicists and language students to do STEM instead and then let “demand and supply” do the rest.
In reality, many of the kids suddenly applying in droves for computer science won’t actually really have an aptitude for that specific course, even if it’s currently a fashionable jobs field. And some kids who have a natural aptitude for languages or history or whatever are being steered away from it to do courses they’re probably less good at. That isn’t actually that great for either education or the students themselves. Even the all-rounders usually aren’t equally good at everything - students still tend to gravitate towards their natural aptitudes.
This is why it matters that some subjects are disappearing from the state sector. Kids need to be given the opportunity to try lots of things to see what they’re good at. If they never get to try languages, or support in learning them, how will they know if they could be good at them? Ideally, children would be able to try lots of different subjects and activities so that they could discover which ones they had talent in. Conversely, though, in top independent schools there will be kids who have had access to every kind of cultural experience on offer, and it still isn’t making them into a Latinist or a historian, because they don’t have that natural ability and that’s not what they’re really talented at.
The kind of ability we’re looking for at Cambridge is a mix of natural talent / raw potential, and yes, some acquired knowledge, because you can’t do the courses without a certain level of that. You can’t just shove raw intelligence into any subject box you like; but you can nurture and develop talent in particular fields. Schools should ideally be offering students a balanced and wide education, so that they can discover what they are interested in and pursue that, and so that universities can take the students who have a real aptitude and fit for the course, rather than being either vehicles for currently fashionable “skills”, or acting as a fake market for delivering young people to employers. That’s not really what the role of the university is. And it’s been a pernicious part of fees-based education policy to pretend that it is.