Maybe that's because men don't have to toss away their shoes like women did (can't run in heels). Dangerous working in those areas without foot protection. Just a half-*ssed theory.
As for the shoe comment...my wife was only a few blocks north when the buildings fell. I have always advised her, our daughters and our son to wear shoes that won't fly off your feet. You never know when you might have to fight or run for your life. Can't do either if you are thinking about your shoes. Now she gets it.