How? Genuine question
At that age it’s largely down to the ovarian lottery, boys who are that level now because of inherited attributes, increasingly these physical attributes or possibly being born into the right environment. I think 90% + of it is due to genetics at that age.
IMO Plaudits go to the lads who put in the effort required on their part over the next 5 years to make a big contribution to their club and county. Plenty minors never do much after.
IMO the spotlight should be totally taken off these 16 year old children.