Fell at the last hurdle

The NZ under 19 team duly won through to the final with a win over England, but lost a closely fought match against old foes Australia. Nerves seem to have played a big part and handling mistakes accounted for the two aussie tries and for numerous other turn overs when momentum was building.
I have started to analyse the video of the final few games from a technical point of view, but the end result appears more to do with luck than with major differences in skill or tactics.