Why is respect conditioned to a woman being your sister or wearing a burqa?

Why is respect conditioned to a woman being your sister or wearing a burqa?
Recently, Faisalabad Agriculture University passed a notification of celebrating Sister's day on Feb 14. Here's Mahwash Ajaz' s rant about this new trend that promotes cultural segregation towards a silent suffering majority. She questions why is respect conditioned to a woman being your sister or wearing a burqa?