why woman is not allowed to become Imam (leader)

Chad Bibi not only defeated Mughals but rule her kingdom with iron fist. Their are many ladies who have been in position of leadership in area now called Pakistan. Pakistan is a natural country and have never been part of India except during mughal and British rule.

Begum Imam shah whose Mazhar is in Karachi many local go to her urs every year was one time great leader of her community. And their is Mrs Allana she was first muslim parlimentarian of Sub-continent from Larkana.