So which one is it - it was important or it wasn't important ?
Ok, I'm sorry I didn't make myself clear. No it wasn't important but the Americans take their stuff seriously. If you mess with them they will make an example of you for deterrence reasons.
Whichever, the US military were hacked with default passwords which makes a myth of their advanced tech and brilliant people doesn't it.
No. Obviously the US isn't just full of brilliant people. There are even bored functionaries at all levels - but the tech this hacker used was US too - both h/w and s/w.