op you are clearly incapable of debating the issue.
Lots of posters here have given alternative senarios that are far more dangerous to children than dogs. And yet you are not advocating that everyone who has a child should give up hot drinks/their cars/never go swimming/play at the park/cross roads/let them ride bikes/have sharp knives in the house... shall I go on?
I have a cousin who was severely scalded when as a toddler he pulled a cup of hot coffee over himself. You could not believe the damage a cup of coffee could do - he spent three months in hospital, has been scarred for life, the treatment given to him (spray to cover burns) made him partially deaf. And all from a cup of coffee.
At school I had a friend who fell off his bike and hit his head on the pavement. He suffered a brain haemorrhage that night and died.
The son of friends of my parents was killed in a car accident.
A friend of my sister's was killed in a motorcycle accident - actually he spent six months in a coma before he died.
I could go on.
I only know of one person who was so badly bitten by a dog that she will have been scarred for life. But the dog was not the family pet - it belonged to friends of the family.
The truth is that you cannot guard against all senarios. Even if you chose not to have your own family dog, there will always be other people that have dogs you will come into contact with.
If you chose not to have a car you couldn't live without crossing roads.
And so the list goes on.
We cannot protect our children from all potential senarios, that would frankly be damaging to their welfare also.