Not understanding the Nimrod capability was not the only Navy deficiency in their lack of knowledge of air power. They were quite surprised to learn the need to protect their ships from low level visual attack aircraft and a lot of modification and practise was completed on the way South once they had been given professional advice on the threat.
Perhaps something to do with expecting to face Soviet attacks from migh/medium level?
More generally, some have suggested that the run down of naval aviation in the 1970s meant that the RN lost expertise in using aircraft as a task force weapon. I think the politicians are to blame for that one.
Admiral Woodward must have got something right as we did win, both the Argentine Navy and Air Force were defeated, without which their would have been no land campaign. As for not having a fuller understanding of aviation - see the paragraph above.
THS
The way you say "getting everyone down there" could be interpreted as if you're glossing over they had to fight once they got there...