The 'unaccompanied minor' threads come up quite regularly on here and I always feel for the parents who have to send their children unaccompanied on long haul flights because of family setup/schools /unusual circs/custody even though they aren't sure the child is equipped to deal with it.
We are all agreed that we need to empower our children in these situations.
But this can't be achieved overnight, and some dc are going to be much older than others before they can cope.
Its quite an unusual situation, we're talking about children who may not have even walked to school/got the bus to a friends on their own yet.
But they are expected to travel on a flight which may be 10 hours+, possibly strapped in with the seat belt sign on, low lights and no option to move or get off or use a mobile.
So given the quite unique circumstances and the duty of care the airlines have, I would expect them to do everything to minimise risks (even small ones) and parents to do everything they can to prepare their offspring.
Its interesting what doctrine said about choosing your seat. Of course, on a long haul flight, the passenger can't do that. The airline makes the choice which I suppose is why they are doing this. I'm surprised too that they are legally allowed to following the insurance changes. My guess is that its not an 'official' policy, just something that airlines do.