So if there were 'actual' tee boxes that reflected the yardage the kids played, call them preteen or super junior tees, then your problem with the score disappears? I mean if a 10 year old in little league bats .625 you don't honestly compare that batting average to a major league average, do you?
If a Little League baseball player was batting .625, that would be great. It's when he's batting .125 and someone calls it .625 that would be a problem. And in the context of his age.
But when someone says "x shot x at age x", with no qualification it's different.
When someone says that Tiger Woods shot 71 at age 11 I'm assuming it was from regulation tees, not a couple of upturned buckets placed halfway down the fairway. I prefer to compare apples with apples. Clearly, some apples are a lot better than others, which is the point.