The field itself is fractured. Many midwives make the point that a complication free birth is not a medical event, and the majority of births are complication free. Have the medical intervention nearby for an emergency, but don't make it the default.

There is a line or argument that intervention is a self-reinforcing cycle, in that the initial intervention raises stress levels in the mother, which promotes a fight-or-flight response, which causes the birth process to regress, which increases the likelihood of more intervention, and so on. This isn't to say intervention should be avoided, but only do it if it is necessary, since it does have consequences.