“They hold that since Rashi merely explains the pshuto shel mikrah – the simple meaning of the text, it would be considered Torah shebiksav in this sense. “
As all of us who have learned Rashi on Chumash know, he often goes far beyond the simple meaning of the text.
And even before Rashi on Chumash was taught in girls’ schools, Tzena Urena was taught to girls; it is full of T”S”B”P.