I have a degree in History from a university which is now RG, though it wasn't when I was there (1974-77). I then did a PG librarianship course and was a librarian for about 10 years before children. But when I thought about gouging back to work I didn't want to go back into library work and have by strange degrees turned into an IT support manager at a school, for which I have no actually qualifications at all.
DH did Maths at the same university, then Statistics MSc and PhD and is now a statistician.
DD also went to the same university (thirty-odd years later, of course) and took Psychology. She thought about social work, and was going to work for a year before possibly doing a post-grad course. She got a job as activities co-ordination at an old people's home - loved the old people but hated the way the home was run. She then got a job as a resourcer in a recruitment consultancy, through a friend's recommendation. She loved it from the start and six months later she's a trainee consultant and doing very well.
DS did History and Politics at a RG university and his initial idea was the Civil Service, but he left university just as the Civil Service freeze started, so that idea was a non-starter. He's now working for a major publisher in London, but it took him a lot of unpaid/expenses only work experience and internships before he got there.
So of us all, DH is the only one actually working in the field for which he is directly qualified, though the rest of us are using the various skills we learned at university - as caughtinagiggleloop says, you can learn those skills elsewhere, but university does put them in a neat package that employers recognise. Though my DC both luckily got through university before the price label on that package trebled...