I like this article on the subject.
"Feminism seeks to address all manner of issues, big and small. That women can (and do) utilize the tenets of feminism in every aspect of their lives does not undermine the history of the feminist movement, but instead does it a great honor. Feminism was never meant to be restricted to suffrage and equal pay, held in reserve like a finite quantity that could run out if it's used for "the little things." Feminism is a renewable resource.
The idea that feminism should be kept under glass, broken only in case of a "real" and "serious" emergency, is predicated on the erroneous assumption that "the little things" happen in a void, as do, presumably, the "real" and "serious" things, when, in reality, they are interwoven strands of the same rope. And as soon as one begins to judge the worthiness of feminists' attention on a sliding scale, even generally-regarded "serious issues" like equal pay are dwarfed by global concerns like sex trafficking or government-sanctioned use of rape as a tool of war. It doesn't have to be one or the other? feminists can multi-task.
And, in a very real way, ignoring "the little things" in favor of "the big stuff" makes the big stuff that much harder to eradicate, because it is the pervasive, ubiquitous, inescapable little things that create the foundation of a sexist culture on which the big stuff is dependent for its survival. It's the little things, the constant drumbeat of inequality and objectification, that inure us to increasingly horrible acts and attitudes toward women."