Not necessarily. First, probably at least until the 1960s, women tended to vote as their husbands did. Since that time, between not getting married in the first place and divorce being far more common, there has been a rise in single cat ladies.
That cultural shift in women’s behavior was one of the “other factors” I was referring to, and one of the big ones, but it didn’t happen in a vacuum. A more affluent society, advertising, a corporate economy that encouraged women workers and glamorized careers outside the home, the replacement of families by the social welfare system, and a new grievance-based ideological climate all played a role in women’s changing attitudes and behaviors.