Universities aren't valued because of the knowledge you gain from being there. They're valuable for the reputation they bestow upon you in later life, they're valuable for the criteria they set to let you in, and they're valuable for the contacts you make whilst you're there.
So yeah, Oxford will always be better than Wolverhampton because 9/10 a recruiter will look at a CV with an Oxford grad on it and think they're pretty smart, whereas with a Wolverhampton grad that probably isn't the case.
We can argue that this is wrong, but in this case perception is reality. It'd be pretty sad if by the time you're 30 you're still using things you learnt as a 21 year old, so most folks will learn way more in adult life than they will at uni, yet the school you went to is still important for recruiters, and it's not because of the knowledge you gained whilst there but more the indication that you can learn things.
I mean these days you can go on Coursera or somewhere and learn an awful lot for nothing at all, yet still people spend thousands for a degree. Uni isn't about knowing stuff, it's about proving to strangers you know stuff.