You hope you never need it, but, at some point, whether as a result of an injury or even to rule something out, most parents end up seeking some sort of specialized care for their little ones.
When my son was young his elbow used to pop out of its socket all of the time. Though ‘nursemaid’s elbow’ may be no big deal medically, to a new parent it is pretty terrifying. The first time it happened, when he was about 6 months old, we ran to the emergency room. When it began to happen more often, we sought the advice of our pediatrician and ended up making many visits to a wonderful pediatric orthopedist. I can’t imagine having to deal with doctors and nurses who weren’t specifically trained to deal with children (and their nervous parents!)