This depends on what one derives from their dysfunctional family. Some of us work to create the exact opposite of what we experienced as kids. I am not personally familiar with physical abuse, not having ever been physically abused and not having abused my children. I do remember reciting those annoying little clichés which I said I never would to my children.
Well, I am all too familiar with an abusive and dysfunctional upbringing, and it put me off having children for good. My Mother and Father separated after 44 years, she could no longer tolerate his abuse. My Mother's father was an animal, incredibly abusive and my Mother always said she had children (5 of them) because she thought she could do better. Guess what? She couldn't. I knew I couldn't do better, I mean how could I given the example I was modelled. Sadly even insight isn't always enough, most people simply unconsciously repeat what was done to them, hence the reason the world is such a fucked up place. The only HOPE for the planet is if adults start advocating for children, but because most people think they are well when they are not and never even think there's a problem. Children are the most vulnerable people in our community and sadly the most poorly treated.
Most people don't seriously analyse their childhood and most societies place little value on researching child rearing and it's impact on future development. Take corporal punishment for example, still legal in many places across the globe. I have no idea why people would have children only to beat them, most people have never even thought about what is the best way to raise a child, they just REPEAT, REPEAT, REPEAT. Parents are supposed to protect their children from abuse, and yet many of them consider abuse a form of protection, terribly sad. That's the biggest problem with childhood abuse, is that adults simply repeat it and often don't even think it is abuse.
I would recommend any getbigger here taking the plunge into parenthood to read the works of Alice Miller, it could only make them a better parent. I Imagine reading her books would be too confronting for most getbiggers who are obviously damaged from their own childhoods, hence the reason they spend a lot of time weight training and posting on a bodybuilding forum.
http://www.alice-miller.com/en/