To be fair, teacher pay sucks. We all know it. There isn't a debate there.
So you don't exactly make a solid point by saying "Hey look! Women dominate in all the crappy low paying jobs! How are they oppressed?"
Do women dominate in teaching because they choose to go into teaching, or because society is corralling them into teaching because it's pretty much on the bottom end of the career ladder?
I'll tell you, any time I look at teaching (which I'd be interested in), I go "hell no" when I see the pay scales, and go back to my normal engineering job.
If you think discrimination is not a thing, perhaps you're deluded enough to think that women, as a large group, are all collectively putting themselves into low paying, low recognition work.
For bonus points, break out gender ratios in education teaching by pay scale. You'll find as the level of academia and pay increases, the ratio of women also declines. Gee, that's funny.