While Democrats are banking on the support of women and trying to make sure that women vote, the left has its own issues with gender that it struggles to deal with. Underneath the surface level performative support for #metoo, however, gender based harassment and discrimination is not only a right wing issue.
While Democrats are, at best, a corporate-dominated center-left party with a history of attacking its left flank, they represent the only viable alternative to the far right Republican agenda. Supporting Democrats, given the alternative, is important. After all, Democrats are the only other political party with real power in a system designed to accommodate the existence of only two parties.