In the past the focus of education of our daughters was in the area of Kashrus and Shabbos, but not in the laws of “damages” and theft. That was the emphasis of the education of boys. We live in a different world now where Jewish mothers no longer kosher their own chickens, but they drive cars and have cell phones. Education will need to be updated accordingly.
For one aware of the laws of “damages” and theft; lending out a cell phone is much more problematic than lending out a Siddur.