Wearing of naqab was there since Pharaoh era, Islam came later , any ways. I will explain you about Hinduism, but first let it be with Islam. in Himalayas, Burkha doesn't work, because they have traditional dress there suitable for hills to walk on hill. Of course there is a tradition to hide face but not while walking on hill, otherwise you will found your self stuck in bushes or 60 feet down the cliff or a lunch of a himalyan tiger. Ever seen a kashmiri dress, they don't wear burkha, they have a tradition of Pashmina.
