@mids2019 to use your case example, a quick Google suggests that for Spanish A level, less than half of the pupils at NLCS got an A star. Now I know that an A star is not required for Oxford MFL, but if we are saying that these schools both accept and produce only the best of the best I am confused as to why they’re not hitting the A stars. My DC managed an A star from a very averagely performing non selective comp, followed by a non selective sixth form college (and we are a POLAR 3 household, and not native speakers, so a very average educational experience all round).
This supports my point that it’s about the required A-level subjects not being attractive, rather than highly performing independent schools being full of well qualified candidates who chose not to apply or get rejected. There’s no reason to think that there isn’t also a large cohort of pupils in the state sector who would ace an MFL A level, but are instead taking Maths, Physics and Economics. EVERYONE needs to know that MFL can be a smooth pathway to Oxbridge, not just a certain cohort.
And my DC's sixth form college also has plenty of straight A star applicants rejected pre and post interview - it's not just the independent schools.