Thiel is against women having the right to vote because he doesn’t like who they vote for. Knowing this makes Thiel fans angry, because they worship wealth.
I don’t know how one argues that the full quote isn’t making the argument that women’s suffrage was a net negative.
As we learned from people like Donald Trump, you don’t have to directly say sexist/racist things to be sexist/racist.
Not only that, the idea being presented is completely unsubstantiated. It’s just lumping women into a group based on their possession of ovaries.