I agree with DramaMama. There have always typically been a lot more men who were composers, directors, etc. I think that there are more and more women breaking into these fields now, which is great.
And, I agree that your concern is more one of sexism rather than of Broadway being "conservative".
“I regard the theatre as the greatest of all art forms, the most immediate way in which a human being can share with another the sense of what it is to be a human being.”
``oscar wilde``