I think feminism is inclusive. There are divisions between types of feminism (e.g. liberal or radical) but Orr is referring to feminism generically. So she's wrong and deliberately misleading people. The only universal really is that we're all after equality and stopping the mistreatment of women because of their gender. Everything else is up for discussion and is discussed, though there tends to be broad agreement in certain areas certainly.
I think for me, when I first came to feminism, I was very sceptical about the attitude some feminists had about makeup etc. I couldn't see why I had 'bought into the patriarchy' simply because I shaved my legs or because I wasn't about to censure a man who looked at porn. I am now one of 'those' feminists though as I have completely changed my mind after reading more about these particular areas. I strongly suspect that a lot of women would change their minds too if they read up on it, but I wouldn't dream of telling another woman what to think just because my own views differ. I will make my case however, just to see if getting her thinking about it may lead her to change her mind of her own volition. But isn't that how every cause is furthered, be it joining a political party or telling people about a great new band you've discovered?
It's hard to realise that you've been manipulated by a male-dominated culture that disadvantages you at every turn. Even if your own DH/DP is a lovely man who treats you perfectly and respects you wholly, none of it takes away from the fact that you are still living in a male-dominated society that actively benefits men and actively penalises women. Mant people try to resist the realisation because it hurts and I think that's why we often get extreme reactions when we point out ways in which women may be upholding the patriarchy without even realising it.
Hope that doesn't sound incredibly patronising. I am writing very much from a personal viewpoint.