lucky they've got the feminists to worry about it for them isn't it?
Yes, actually. Women who choose not to think very deeply are very lucky to have feminists looking out for them and thinking about their rights, on a whole range of issues.
You meant to be sarcastic but - there were women who were vehemently opposed to women's suffrage, they were lucky to have feminists looking out for them.
Women often make deeply unfeminist choices, whether its because they don't think about it, because they have to do what they can to get along in this world and that takes compromise, or because they know it's harmful to women but it suits them and their alright jack. Feminists look out for all those women.
Some issues are smaller than others. Doesn't matter. There's no harm in consciousness raising even on the little things. Changing your name on marriage is a part of patriarchy (or whatever you want to call our traditions and system). Might not actually harm anyone, but it doesn't hurt to think about it and query it. Clever people like to think about lots of things, big and small.
This entire discussion (I'll call it that) began because you said it was ridiculous to attribute women's changing their name to patriarchy because it was a free choice. When queried why they chose it you answered 'because they chose it'. I have merely pointed out that it comes with a long history of patriarchal overtones, and that if it were a free choice devoid of expectations, men would do it in equal numbers.
You can sneer about how much it doesn't matter all you like, but the tradition is what it is, the history is what it is - and there's nothing fatuous about acknowledging that.