It is more about politics and power. They think of us as heretics attending births without a medical degree. For most women, birth is a very normal process. She pegs the chances of emergency problems at one in 10,000. Sometimes it is right when you are there trying to catch the infant, and have to call someone or decide what to do.
Time is precious, and both moms and infants can be in jeopardy.
The nurse encountered a last-minute emergency problem when giving birth to her son and believes she and the child both would have died had not hospital help been immediately available. The existing act is appropriate. You've seen a good example of why, recently.