"I don't get why THEY don't get it."

If we could answer this question, we might be farther ahead. My sense it that it's a combination of a number of factors

- an unwillingness to see women as human essence. Far better to view them as a separate species with unique "talents" curiously not aligned with what is normally considered intelligent, analytical, inventive, decisive, passionate. . . you know, the traits that Actually Move the World Forward. 

- no/little experience working with women as colleagues. The idea terrifies most of them. 

- an investment in their own theology of gender which says females were created for males. Why believe the help? 

- no motivation to change. It's been a good gig thus far. 

My experience is that when "men get it," they become fierce allies and articulate spokesmen about sexism (as many men here demonstrate daily). 

But you need a reason to "get it." What theirs?