Well you being female would explain why you would not notice the lack of aggression. Females play games like the sims and find enjoyment. Men like something a bit more challenging and "war" like.
I hope you realize at some point what a gross generalization you're making, not to mention how offensive it is.
On top of that, there is nothing inherently better or worse about a game that focuses on combat or one that focuses on social aspects. By all accounts I am a male and I enjoy The Sims and a number of other games that have little or no combat focus. My wife also plays The Guild and while she does not focus on combat at all she is always far richer than my dynasty. We also play Dawn of Discovery, Demigod, and Left 4 Dead together.
Besides all of that, I wish more games would focus on non-combat oriented aspects. Many cultures are far too focused on competition and violence, which is probably one of the reasons these gender-prejudices and hyper-masculine notions arise, viz. "real men solve their problems with violence." I find it refreshing when games attempt to provide alternatives that focus more on creation and cooperation. Ah well, I'll just have to settle for being less than a real man.