I went to uni straight from school. Dh failed his A levels and then went as a mature student when he was 24.
I guess we'd both like our dds to go to university, but only if it's what they want (surely everyone would say that). I certainly wouldn't try to persuade them to go at 18 if they didn't want to. They can always go later (like dh), or do a degree while working (though that's a difficult way to do it, IME - my sister has done it, and is now doing an MBA that way). Although I have followed a pretty linear study-career path, dh has always dipped into different things (he has been a road haulier, musician, recording engineer, student, lecturer/teacher and only got his present job - which is likely to be vaguely permanent - at the age of 39!) and he hasn't suffered too much for it.
I see university-level study as having an intrinsic worth in its own right, which doesn't necessarily need to lead to a job. So, yes, an English degree may be 'worthless' in terms of training you for a career, but you have all the time in the world between the ages of 22 and 65 to do a career. If you can spend three years reading and talking about books and 'big ideas' and being guided in your reading of some of the key texts of our culture by someone who really cares about it... well, just wow really! I know I may be a bit odd, but I find that exciting and important for its own sake, not as a way in to a career/bit fat salary.
Having said that, clearly I wouldn't cry (much!) if my dds eschewed literary pursuits in favour of merchant banking or marketing or whatever. At the moment, though, they both want to be childminders. How fab a testimony is that to my lovely lovely childminder? I'll settle for that for now...