The problem is that scratch level golfers are just so incredibly consistent that they will always shoot relatively close to par, whereas anyone from probably 12/13 upwards could easily shoot 80, but could also shoot 100 on any given day as the consistency isn’t there. You don’t tend to get teen level handicappers who just consistently shoot 85, they’ll have some great rounds and some stinkers.
I’m a 15 and my best round is 6 over, but regularly shoot into 90s.