As the saying goes: "If you're good enough, you're old enough". Or, in this case, young enough.
The tries are worth the same if they're scored by (or have the last pass given by) an old bloke as they are when it's done by some teenager.
If we could have another half a dozen "crocks" of Field's calibre, I'd imagine we'd win a few more games.
Regards,
TDT-1 (back in this blasted Middle Kingdom).