Considering that I was in a group that was able to reduce him to 1 HP while fighting the Undead waves, the game mechanics being the only thing stopping him from dying, yes. Granted, according to lore, the Scourge, despite being beaten back, needed a Lich King to "hold them back." Many people didn't buy that excuse, and I wasn't one of them. We should have slaughtered them all.
Weakness is running from your opposition. Strength is overcoming it.