Are all birth injuries avoidable?

Macrosomia. Macrosomia or large for gestational age infants are at high risk of birth injury. Jcaho is monitoring all the maternity hospitals for prevention of these types of injuries ranging from clavicular fractures to brachial palsy and CNS injuries physicicians' malpractice insurers have workshops and/or training courses to detect macrosomia before vaginal delivery and consider c-section.
Most. If everyone was born by cesarean section, birth injury would be rare. We would trade the risk to the baby from vaginal delivery for the increased risk of major surgery to the mother.