Hair covering is a mostly a religious identity statement and the particular kind of hair covering you choose is a political statement for your co-religionists (fine distinctions being usually lost on outsiders).
Women are endlessly inventive when it comes to personal decoration and what looks to some like an authoritarian stricture is simply (another) challenge

That said there are "pathologicals" like me who know that 70% of body-heat issues (hot or cold) can be solved by covering the head and therefore consistently wear hats from a physiological motivation.