Why are the Taliban so afraid of women ?

The surest way to guarantee your access to power,wealth, and resources has always been to implement a caste system with your demographic at or near the top. By creating castes and hierarchies with your group at or near the top you ensure an abundance of resources, power, and wealth for your demographic to feed off of in much bigger slices.

This is pretty much the foundation of all castes and hierarchies the world over throughout history. To deny one is to increase the bounty of excessive for the other..