Elmo – you’re right that she can and should learn herself, as should every woman. According to Rav Avigdor Miller, Zatsal, a woman would need to learn for at least 60 years to finish learning everything that she is OBLIGATED to learn.
But, at the same time, I have always learned that there is a difference between a man’s learning and a woman’s learning, and a woman receives a unique reward for enabling a man to learn.
If a woman wants to get the full share of Limud Torah that is allotted to her, she should do both – learn herself and support a man’s learning.
As Rav Hutner, zatsal said, a woman has a double portion in Limud Torah – her own and her husband’s. (and if she doesn’t yet have a husband, presumably she can receive it through helping other men/boys to learn.)