Men and women are competitors today. Opposites may attract and differences complement each other, but when people are striving for the same niches and climbing the same rungs on the ladder, greater friction is inevitable.
Women certainly do have the best deal so far as divorce is concerned today. It's unfair, but maybe it's but a revenge for an earlier generation, when men could walk away with greater impunity. Tales from their mothers' generation have made women tougher and more callous about divorce, and this in turn makes men more "committment-phobic."
I have seen far too many divorce cases where the woman acted as competition rather than partner. This is just anecdotal observations so it is not scientific. The shortest was 3 months the longest almost 4 years. Women who want to build a family (real family not motherhood by proxie) are rarer.
To those women who wonder why men don't want to marry them, its because men don't like you. As a person and any other measure of attraction.
BTW: to those naysayers about sex in marriage. There are studies which I have read in law journals which state the reduction or elimination of sex within the marriage causes the equal sense of loss as a death in the family. sex matters. (aka making love. emphasis on the "making")