Nobody does it 'just so you don't have to stand on your own two feet'.
Women are told they are stupid, ugly, fat, incompetent parents, morons, ridiculous, their opinions trashed, their decisions second guessed, blamed for every single silly thing that goes wrong and for every massive thing that goes wrong, and after even a short period experiencing that, believe it or not, they begin to lose their confidence and wonder how they could possibly manage on their own.
They lose their courage when they are the victim of a bully in their own home. They wonder how they could have been so stupid to agree to a relationship with the man who has made their lives miserable. They blame themselves and feel overwhelmed, and wracked with guilt for the effect of the terrible home life on the children. Many feel they have no options (this is the ultimate aim of an abuser) and many feel paralysed.
On top of that, the stress of waiting for the next verbal or physical assault does a number on your ability to focus, to plan, to think ahead even a day, because all your energy is used up just keeping everything from blowing up today, this minute.
You can end up with debilitating anxiety or even depression. If you have PND, it can make it much worse.