Yeah, the Quran doesn't have a verse which specifically says that the wife can strike her husband. But it does not prohibit such a thing either.
Islam ensures equality between men and women. What it does not provide is identicality. Modern cultures enforces identicality on men and women. Men and women are not identical. They are different, have always been, and will always be different. The psychological pressure that modern society leverages on women to mimic men and become identical to them has destroyed many a women's life forcing them into situations against their very innate nature. Islam ensures that there is equality between sexes, even though the roles may be different. It ensures that in areas where women are natural leaders, men play a supporting role and it ensures that in areas where men are natural leaders, women play a supporting role.
Islam ensures equality between men and women. What it does not provide is identicality. Modern cultures enforces identicality on men and women. Men and women are not identical. They are different, have always been, and will always be different. The psychological pressure that modern society leverages on women to mimic men and become identical to them has destroyed many a women's life forcing them into situations against their very innate nature. Islam ensures that there is equality between sexes, even though the roles may be different. It ensures that in areas where women are natural leaders, men play a supporting role and it ensures that in areas where men are natural leaders, women play a supporting role.