Because most Muslim societies do not follow basic Islamic teachings of equality.
And because non-Muslims will need more than a Quranic passage to buy into women’s rights.
What’s sad is that in the Muslim world, a feminist becomes labelled as “Westernized” and heretical simply because she speaks up for herself and other women. Women were speaking up even during the time of the Prophet (PBUH). They did so as concerned members of society and he listened to them. Women today are the same; the rhetoric is just different.
Feminism does not attack Islam. It is an ideology borne out of the same spirit as Islamic teachings of justice.