So, even though she was homeschooled, i would imagine she's had some exposure through the education her brother receives at the local public school.
In the interest of full disclosure, my brother’s program, while administered by the school district, is at a private school.
However, I don’t think it’s valid to say that I don’t have a valid opinion since I haven’t experienced the school system directly. That’s an argument that some people like to bring out to shut down opposition to whatever they are saying - “You weren’t in the military? You can’t comment.” or “You haven’t had an abortion? Don’t talk about them.” It is valid for me to say “the school district I grew up in was a ‘good’ district and yet had X, Y, and Z problems” because both those facts were well known in my community. I personally worked with the father of a student suspended from the school because a pipe bomb was found in his locker. I went to Sunday School with students who literally could not read and yet had high enough GPAs to keep them on their sports teams.