I would guess a bigger percentage of kids would be able to qualify for a dance degree/fashion degree because they will just need A.level points rather than grades in academic subjects at A.level. To even be able to study for a maths degree, you need grades in certain subjects rather than A.level points.Whats the job? If I'm hiring for the local ballet it's a no brainer. Ditto if I'm hiring a statistician.
Just like the person that does a degree in fashion or dance (using the last example). They are clever enough as well. It takes all kinds and there will be a lot of brainy kids that will get degrees in "lesser" subjects because that is what will interest them.