I think there are a number of issues here.
First of all I think there are far too many young people at university who should have either taken a gap year or explored other options. There are too many who are so unprepared for independent living or are not self motivated or self starters. Schools push the default as being university with no other options, and I think that is wrong. University isn't for everyone.
I agree that schools and 6th form colleges could do more to provide information and encourage independence.
I didn't get the impression that parents of ND students were being unsupported, if anything I thought that there was a lot of useful information and support.
The number of over involved and clingy parents is worrying. I once had a post removed when I suggested that we as parents were responsible for ensuring that our young people could cook, know how to use a washing machine and learn various other life skills before leaving home. One poster said that her son couldn't cook because he was a boy, and I admit that I challenged that 
On the whole I think it is a supportive group, and I very rarely post these days as DD has now graduated.
And the oversharing is bonkers. I have never shared anything at the level that so many posters have. Even when DD graduated I didn't say what classification she achieved, and I have never posted pictures of her or her accommodation or my car packed to the rafters.