Actually, no one is, if the Empire really cared, they could take their whole army and kill the Nords, same as the Thalmor, Argonians, and the Redguards if they weren't so busy. The only race they might have a chance against are the Dunmer in their current weaker states, but then again, they'd probably win
It only came in with Dragonborn. In vanilla Skyrim very few Nords wore heavy armour.
Their soldiers wouldn't either considering light armour is generally better in a cold climate. Still, when facing an actual Imperial army full of heavily armoured legionnaires, their light(er) armour would be a major disadvantage.
I can also destroy an Orc with an iron sword that doesn't mean that Orcs are weak. I believe what versifer is going for is that Nords are among the best warriors in Tamriel, which they are. Orcs are strong and Redguards are skilled but crazy beats everything and Nords are insane plain and simple never never mess with a pissed off viking!
Redguards are the best warriors on Tamriel, that's a well known fact. Orcs can come close with their ferocity and Argonians when it comes to the guerilla tactics, but in terms of one on one combat Redguards will pretty much dominate everyone. Nords... will be killed by at least Orcs and Redguards
No and that wasn't the point. All he said was that Nords generally use lighter armour, wich they do. Nothing prevents them from wearing heavier armour though, and if the climate allowed it maybe they would favour heavy armour a lot more.
The point wasn't presented clearly though, so the confusion is understandable. :)