Of course, since some TK'ers like to entomb people in heavily barricaded buildings, there is a flip side to this. A new player can enter a barricaded building for protection, have someone like Akhart, Lippsyl, etc, stroll in and kill him and leave him (or even up the barricades) and his next full round of AP is spent merely trying to get out of the building. Seriously, not fun.
I rather think that the point of the game is that things do NOT favor humanity. All of the tropes of the genre point to mankind's eventual downfall. Best case scenario should be a short bit of peace during a well carried out holding action, not any sort of extended safety. I mean, if that were the case, the fort should be much easier to hold.