'Um, maybe the fact that even with perfect grades it is quite likely you will be rejected from every university you apply to
Yep, that's what happened to my cousin this year: A's at A Level, garde A music, plays in a band, volunteered at hospital for eyars, DofE.... no offers. nobody has a clue why, feedback is just that it is a competitive subject.
Except yes, but if you don't try you can't succeed, so what does he do now with no offers and a year to fill.... (answer is probably something, Aunt is very capable to sort (former HR at big multinational LOL, but Mum hasn;t said yet).
It's a risk though.
Luckily ds1 doesn;t want to go to Uni for the career he wants, maybe it's even lucky that ds3 can't go to university for his SN, so only leaves ds2 and ds4. Maybe i'll sell DH? he's very handy with a mop 
If they want to go they'll go, the4y'll take the laons and we will do all we can to help them manage the repayments. I am not letting a had-it-easy-themselves bunch of over priviledged pricks stuff it for them 