I don't think there is anything wrong with a 50/50 split if you are both working full-time. Including in the 50/50 split would be like cutting the grass, taking out the trash and shoveling the snow which is more for men which would leave more of the cleaning and laundry for the women.
Now the problem comes in when for an example, I have a friend who works full time and does a majority of the cooking and cleaning and his W is a stay at home mom with one 14 year old daughter. Those are nice guy beta male tendencies and she has no respect and walks all over him. BTW he claims they never have $ex. Shocker right?