Because our country is 100% Muslim and we follow the teachings of Mohamed PBuh.
The West is obbsessed with what Muslim females are wearing which doesn't effect them especially the hijab, Have you heard anyone complaining about the nuns at the church, they wear white Hijab too.
The Koran and the Hadith both talk about the modesty clothing of our women, covering oneself saves them from perpetrators like you who wants to see them semi naked for your own pleasure.
Just go to the beach and watch all those semi naked hoes and don't exploit our gems.