You have to do something- but that something can be deciding to be a feminist and hold feminist views. And at the very least, not denying those views if asked about them
I completely disagree. The only women I would describe as genuinely not feminist are women who actively do not believe that women are equal to men, and do not believe they should have equal rights.
For Western women, by whose I mean raised in the West with Western values (ie values that have been strongly impacted by feminist philosophy) if they are educated, they work, they vote, in short if they utilise all the rights that previous feminists fought so hard for - they are feminists whether they admit it or not.
If a woman believes she should be paid equally for the same job as a man, that belief is founded on the principle of equality, the cornerstone of feminism.
If a woman is genuinely not a feminist, then she needs to be prepared to hand back all those rights.
Take all these so-called non-feminist women back to 1860 - no right to education, to most work, to vote, to their own assets after marriage, even their own children, they would all discover that they are actually feminists pdq.