Whilst I agree that universities should not be reduced to 'expensive finishing schools', studies do show that WC kids get the chance to acquire knowledge of social norms for workplace success in HE.
It may benefit young people from certain groups to go to university EVEN IF they're not academic & the degree course itself is not highly valued. We are all of us making decisions in imperfect systems.
A placement year or year in industry can provide work experience for the CV, a portfolio and contacts that would otherwise be difficult to obtain.
Other countries have national service programmes that include options outside of military service, much like the live-in voluntary placements a PP described.
Maybe this would allow teenagers to mature, live away from home, gain life skills, take more time to decide what path they want to commit to, all with the benefit of infrastructure (notably accomm + subsidised public transport), support, adult guidance & the collective peer group experience that university provides.
Just imagine if everyone, male and female, had to work in an essential role such as health / education / social work. for 12 months. How might that transform our culture & society & the value placed on jobs / salaries?
If only the government had time to address these issues rather than perfecting crony capitalism!