“Women always had a yetzer hara, and always were given the tools by Hashem to deal with it, and that never included the mitzva of limud hatorah.”
Popa, women have always had a more limited mitza of limud hatorah, in the form of limmud al m’nas laasos and hakhel. In previous times that was sufficient to combat their yetzer hara, which was (and still is) weaker than that of men (especially because they spent most of their time in the home). Additionally a particular woman who faced a stronger yetzer hara, could always supplement as an ayno m’tvuva v’oseh.