Athletic Development in young populations

I have been amazed at the increasing number of parents that request athletic development sessions. It made me realise that over the years our athleticism has declined. Recently I have been working with many young athletes and it has been interesting that over 90% had difficulty performing a forward roll which is a basic fundamental movement. This is only 1 example but maybe this has much to do with the early specialisation of children into sports that dont require early specialisation. I see it most in the so called elite junior player particularly in soccer where that is the only sport they play. There is no time to play cricket, do little athletics or even just play in an unstructured environment. Therefore I believe our youngsters are missing out on oppurtunities for athletic development or the incidental aspect of AD and unfortunately all their AD is structured. I welcome your views