HearsHooves you really are looking for an argument aren't you?
Let me try to be clear so you don't deliberately twist my words. I'm taking in general terms here, just in case you take this (erroneously) as some sort of personal swipe although I know that won't stop you
Parents are always parents of their children. We know our children are adults, but it doesn't stop us parenting them, in all sorts of ways. My mother still mothers me, although I'm 60 and she's 85. She parents me in a different way from when I was 8 or 18, but she still parents. We still care, we still worry, we still try to make our DCs' lives easier, or happier. We still advise, we can still admonish ... all sorts of things involved in parenting our children throughout ours & their lives.
However, once people are 18, they are legally adult in this country. So people who are NOT the DCs' parents (or legal guardians) must - by law - treat these DC as adults.
However this may not necessarily change the way that a parent interacts with their child. I would imagine that parents still advise their DC all through late teens and into their 20s, their 30s.
But university lecturers are not the parents of the people they teach, nor are university staff &in loco parentis^. Because most young people at university are 18 or older (although I was 17 when I went, but that's bye the bye).
University staff have a responsibility - a duty of care - to their students as any professional in any public relationship has with a "client" (for want of a better word). Like a doctor, for example.
So, while university staff can give likely applicants to university advice about attending university at open days, or admissions interviews and so on, we do not - nor should we - advise on the very basic question "Should I go to university?" We can give them information about what it might be like, in general terms. But we don't know intending applicants in the domestic, intimate way that a parent (or other guardian) does.
That is a discussion for a teenager to have with his or her parents (or guardians).
As a PP says, if a parent knows their DC has a MH issue which will make university a more than usual challenge - and university should be a challenge. It should be hard, it should be difficult, it should have stressful times - hard work, learning difficult things, can be stressful. Certain kinds of stress are good for us - the stress of learning something difficult, and then learning to do it well. This is learning - it is not easy.
If a parent sees that this might be almost too much for their child to cope with, then it is their job to discuss this with their DC.
I should have thought this was pretty obvious, but there you go ...