That contradicts itself, hardcoe mode isn't supposed to be difficult?
Believe it or not... hardcoe mode is actually not really some variable set in stone.
In some games, it has no direct effect on the game's "difficulty" at all. Instead, it adds in different challenges which more accurately reflect real life. Such as Fallout: New Vegas and having the need to eat, drink, and sleep. This is something that the Elder Scrolls community has been designing, on its own, since Bethesda first put the tools in their hands.
There's nothing contradictory about the statement. It's not about difficulty.
It's about realism. Realism just makes the game a bit more challenging, sometimes, because you have to think like a person and not like a player.