I think that the "father" issue is as much women walking out on their marriage/husbands as it is men walking out on their family.
The difference is, that the women, for better or worse, is generally granted custody over the children instead of the father...
This makes it appear to be a "father" issue instead of simply a marriage break-up issue...
I agree that there are many horrible dads that abondon their family,
But when emotions and all that are taken into consideration, the woman
has just as much fault many times as the cause of the break-up/walk-out.