Or, ya know, he doesn't know the moral implications of his writing or lacks the ability to finish his stories.
IMO, it's the emphasize that matter more than the actions. Under Millar, it's the politics that get emphasize. That the heroes won because of superior firepower is something that he often overlooks or flat out ignores.
I don't condone torture, for instance, but really don't care when it shows up in my entertainment. The only time it annoys me is when writers call it out and laud it's effectiveness or how it's justified in that situation.
Same with Millar. The nuance of that is really lost on him, IMO. He compared his Ultimate Avengers vs. X-Men to the United States' war in Iraq because of 9/11. But if one went with his metaphor, then there was an actual link between Al qaeda and Saddam when there wasn't one in reality.
Just because a writer knows the defination of a metaphor doesn't mean they can use it well.