basmelech, why should sheitels be assured? So that you can follow the “fashion” trend? If you feel that sheitels are wrong, don’t wear them. But for those that follow rabbonim who allow sheitels, let them be.
What I was always taught is that you cover hair because its erva. The hair has to be covered and can even be covered with a sheitel made of your own hair.
FWIW, I don’t own a sheitel.