While I do agree that most great things have been done by men, and that women overall are less logical and more egotistical, and not just by nurture but also by nature, you're behavior here is precisely that.
You're being illogical when you say: "The function of woman is physical attraction, thus unattractive women are dysfunctional and useless, thus should not exist." It would be more logical (and honest) if you instead say: "The function of woman for me is physical attraction, thus unattractive women are dysfunctional and useless to me, thus there is no reason for me to include them in my life." Indeed, attractiveness is not the absolute function of woman, even if biologically and culturally she is made to be so. Any half-way decent Nietzschean and nihilist and logical person should know that!
You're being egotistical in that you're turning women into an aesthetic and sexual object, a thing to have and want. What if women want to be something other? And again, what if men want women to be something other? I, for one, don't care what a woman looks like. I have no need for her to be physically attractive.
So, I'm not saying you're a sexist or misogynist or oppressor of women. You're probably a cool guy and all. I'm merely pointing out that you're behaving exactly like the women you find useless. Thus, not to threaten, but merely to continue your own line of reasoning all the way: Why, diesel, should you exist?