Well, yes, I think The W.H.O are still working on that one, Oh, you mean -in Game-! Gotcha.
Basically what someone above said, lorewise it needs specific types of people to raise undead, its not quite the same as a Zompoc where being bitten by a ghoul would turn you, but needs certain types of Necromancy to make it happen.
Logically, I can see where Blizzard were going with the whole “There has to be a Jailor of the Damned” motif (a term that has become strangely ironic given the new expansion’s bad guy’s name) in that only the Lich King can keep the Scourge in check, and I can see what they were going for, I really can, but I don’t think they thought it through properly.
Y’see, if there was no Lich King/Queen/Duke/Satrap/Panjandram/whatever, so no Helm of Domination, what would you have?
The Scourge would basically just be a big Zombie army with no leader. There wouldn’t even be a lure for people like the Cult of the Damned, because without some sort of central control, there’s no one really to make a deal with, or at least go “We’ll work for you dread lord as long as we are spared”, so really this whole idea of “Without the Lich King they would be even more dangerous” is just rubbish.
The Scourge would be -more- dangerous if someone wasn’t actually using tactics, commanding them, had aims, and could recruit quislings from the other side instead of just being a mindless slavering Zombie army?
Lets look at what the Scourge would have accomplished without a Lich King.
…
Yeah.
Thats it.
Because there wouldn’t -be- one.
Undead simply did not exist in that way.
But lets be charitable, and say that somehow for some reason, without a Lich King, there was a Zombie Apocalypse in Lordaeron. Sad times,
For Lordaeron. Everyone else would be fine, they wouldn’t get through Ban’dinoriel as the Treacherous Dark’han Drathir is not likely to try and betray his people to an enemy whose basic thought processes are “Duuuuuuh…Brainz” So the High Elves would be fine, and wouldn’t even need to rename themselves to remember the fallen, as there would not be any fallen to remember.
The Dwarves would just go “Well this sucks, but thats fine, we’ll just blow up the Thandol Span and sit here with our excellent Mountaineer snipers and take pot shots at the Undead’s heads, whilst over on the other side the Thalassian Farstriders will be putting arrows in their heads, It’s like a shooting game”
Its nonsense, the Scourge is far more dangerous when there -IS- a Lich King…