Christians of a conservative bent, especially evangelicals and fundamentalists (the groups overlap greatly, but there are distinctions), take very seriously the biblical passages that teach submission of women to men. Women who are raised from birth to believe this stuff have a hard time getting over it, especially if they are home schooled, or educated in Christian schools, etc. It’s very easy for evangelicals and fundamentalists to construct social bubbles and live most of their lives within those spheres. Bear in mind, also, that even American public schools, within the lifetimes of many of use on TPM, taught, sometimes subtly, sometimes more openly (a) male superiority - this was more open, and (b) white superiority - this was more subtle, but hard to miss over a lifetime.
I’m not trying to excuse conservative Christian women, but I know that many of them often tamp down cognitive dissonance in order to keep their lives together. They sometimes have a lot to lose if they break out of their prescribed role. How do I know this? Consider me one of the breakaways.