Cheryl Schatz

As far as why the head of a married woman was shameful but the head of an unmarried woman that was not covered was not shameful, Jewish tradition said that a married woman’s head hair was seen as a sexual part of her, not to be seen outside of her home. It was considered such a strict “law” that a woman could be immediately divorced if she was caught in pubic with her head hair uncovered. This was not God’s law, but it was a man-made law.

Also the quote from Wallace, it is only the one imperative that is stronger. The other imperative regarding head covering is not a command or a logical necessity.