I suppose we all have experiences. I raised two kids in a "Broken" environment. And now I have two children in a stable home with my current husband. The difference is night and day.
We can always fall back on statistics. Statistics show that children living in a single parent home have alot of issues...the majority of prison inmates are from single parent homes. These children are prone to be depressed, on drugs and don't do as well in school. They have behavior problems, legal problems...and in general are born into an environment that is not beneficial for them.
Sometimes it is good to look at what a behavior does to your next generation before you advocate it.
Causation and correlation. Who cares if there's a difference, right?