So Durham University are ignorant of it? Liberal arts isn't science and anyone suggesting otherwise is daft to say the least.
'Liberal arts' is a distinctly American term, referring to a particular type of college that focuses on academic study rather than vocational or technical skills. The term is used in American politics (and surprise, surprise, the OP is American) to wind people up into thinking they're all studying ethnic basket weaving and gender-based hemp tasting. It doesn't, it just means they teach physics instead of aeronautical engineering. Maths instead of finance. English language instead of journalism. And yes, art instead of graphic design. An academic dissertation rather than a technical project. Of course, in practice, 'liberal arts colleges' are just colleges and will teach whatever will bring in the students these days.
In the UK, including Durham and Manchester 'liberal arts' is the name of a specific course that allows students to combine various arts and humanities into a single degree. Nothing about the OP's post suggests that this was the meaning he was going for.
The OP put liberal arts in his post, but the (UK-based) article he links to says absolutely nothing about liberal arts courses. The only evidence we have of this drop in liberal arts (and I'm not denying it's happening) is 'my mate said.' But if true, this is a classic result of debt-based education. When people have to take a financial risk, they often choose a subject with a clear career path attached. And it doesn't just affect the arts and humanities. So you do get people who are good at maths studying finance instead of maths, not because they're more likely to get a job, but because they can more clearly visualize what that path will be.
This is particularly the case with international students, which is why it's funny you conflating the two issues. International students are leaving because most degrees are a con (paraphrasing). But they are precisely the students studying the kind of subjects that you think
are worth studying. How many international students do you think are studying media studies?