I don't know if this is some kind of heresy, but here we go.
I don't think universities provide much value at all to the common student who is not going to be a PhD.
I went to a very well-known institution known for putting the students in a room with the professors, maybe two or three students, to one professor. My economics professor taught me one on one.
I still think, in the end, the work is mostly done alone, in a pile of books, on your own time.
Not with other students, and not in lectures, and not in tutorials.
This is a bit different from school where you can actually learn the material in class because, let's face it, school doesn't have a very deep curriculum.
So at university my impression is that they mainly tell you what to go and read about, and then you read about it yourself. The tutor is there to course correct you a bit, but they aren't going to do much other than save you a bit of time learning the orthodoxy of your subject. The lectures are a table of contents. At most, it's really just a guy telling you that you should know what an eigenvalue is, or you should have read about the ISLM model, and so on. For you to actually understand something, well, you have to have spent a lot of time in the books rearranging your mind.
Given that this is what you actually do at university, why have it this way?
Make an examination authority. "Here is the national linear algebra test. Anyone who wants to try it, sign up, and come to this hall on this date." Everyone who passes, whether they studied at home or went to fancy U, gets a paper that says they passed it. Do it as a 12 year old prodigy or a 75 year old grandma, you get a diploma.
Now, maybe there is already an authority that does this, I don't know. But it isn't very well known or authoritative.
The current incumbents are gatekeepers. Everybody thinks that smart kids go to the most prestigious universities, and that includes employers. It's a Schelling point that doesn't need to be there, and it allows the universities to extract a great deal of value from the kids.
If you made this authority of examinations, many people could learn the material and show their competence without incurring huge costs.
People could start working earlier. You could separate the coming-of-age experience from academic learning. Poor people could participate more.