If you watch her sew on the videos, her stitching is far from straight ... actually quite wicked at times.
I have heard her mention it, with just a comment like, oh it won;t really show when it is done.
I was watching a video recently where she was doing some quilting for bags .... and sorry, yes it did show and would show as crooked on top of charm squares is only emphasized more and more.
Perhaps her whole thought pattern is to be less intimidating to the beginners, by not being a total fuss pot in what she does?