Is Wearing Hijab An Obligation What Makes Ghamidi Sahab's View Valid?
The verse does not specify face, hand, or head. It is our habit of dressing that tells that face and hands are not covered. Covering is about Zeenat. If there is no zeenat on the head, the verse does not require it to be covered. Muslim women cover their head as a cultural norm.
It appears that there is some confusion between the concepts of ʿAwrah and Zeenat. Covering one’s private parts and the areas surrounding them is a separate matter from concealing zeenat. A person is required to cover all zeenat—such as makeup and adornments—except for what is customarily left visible. What may remain visible is determined by cultural norms. Generally, the zeenat of the face and hands is left uncovered and exposed. However, adornment on the chest area should be covered. Earrings are considered part of facial adornment and may remain visible. The head itself is not considered a private part, so it may remain uncovered if it is not adorned. If it is adorned, then whether it should be covered depends on cultural expectations: in some cultures it should be covered, while in others it may remain uncovered.