"Oh, we can all use the shit out of Excel, but how many other candidates can DESTROY YOUR FACE WITH A JUDO CHOP! HI-YA!"
What kind of namby-pamby sports do you practice?
(I mean, all of the ones on this list, obviously, none of which are as exciting as lethal sword-fighting.)
And, in that case, they wouldn't really need nukes to eradicate the Na'Vi. Just regular old conventional space-to-surface rockets would do it.