My middle daughter is now 23 and was in the ATC for six years from 11 to 17.
She flew plenty: gliding, AEF and in service aircraft. She went on several camps and attained all three Duke of Edinburgh awards. She gained considerable awareness, both of others and herself, discovered and developed an ability to motivate and organise people, and represented the Wing at swimming and running, as well as playing football and hockey at squadron level.
The all round personal capability and capacity that she built up propelled her to spend seven months traveling the world after her A-levels, entirely self-funded. She now has a very good 2.1 from Bristol and is teaching English in a remote town in Equador.
I'd say the ATC was doing pretty well.