ExaltedWombat
No. Use any contacts and influence you can muster. Your job is to support a child as much as possible, not just throw them into the system with a 'you're on your own now, sink or swim' attitude.
I think there is a huge gap between micro-managing your children's lives, taking over when things get difficult, and 'just throw(ing) them into the system with a 'you're on your own now, sink or swim' attitude'.
IMO, it is our job to bring up our children to be independent and capable, and to give them confidence that they can do things for themselves. This is, of course, a gradual process, but it should be well under way by the time they are 15 and doing a school/work placement that lasts for five days. If it's not the perfect fit they will survive, and may well learn coping skills that will serve them well later on.