Schopenhauer also wrote some cracking stuff on women: http://www.heretical.com/miscella/onwomen.html
After the elderly Schopenhauer sat for a sculpture portrait by Elisabet Ney, he told Richard Wagner's friend Malwida von Meysenbug, "I have not yet spoken my last word about women. I believe that if a woman succeeds in withdrawing from the mass, or rather raising herself above the mass, she grows ceaselessly and more than a man."
He might be a misogynist, but at least he recognised exceptions.
It's also interesting (in the context of his time) to note that he was a strong supporter of abolitionism and animal rights.
When a philosopher sits down and writes about their perspective on a topic, it's a safe assumption that they thought about their conclusions before publishing them.