It is tragic, but children die from all types of reasons.
I think you seem to not understand the logic behind this.
A child could get killed by anything potentially. Do you therefore never take them to a theme park? Never let them go go karting? Never take them swimming in the sea? Never let them pet a goat at the zoo/farm?
Getting rid of dogs will not stop children dying in tragic ways, and even if you got rid of all dogs in this country you may save a few children at most. It just is not rational.
Yes but other things are controlled and regulated in order to minimise such events.