What is the sole reason for the temptation of immodest display among Muslim women?

Immodest display (tabarruj) is a grave sin with multiple causes, among them: following family customs, imitating disbelieving women out of admiration, and ignorance of religious rulings and that the hijab is a great obligation. However, the primary reason is the weakness of a woman's faith and her lack of certainty. If the deterrent of Allah were strong in her heart, she would not commit immodest display. The aforementioned sins may deprive her of the blessings of hijab and chastity.