The idea that one of the people helping my wife give birth could have no training, or that people are being 'kept out' of the role because they don't have training or experience, seems idiotic to me.
This isn't the 1800's, where your midwife was 'the woman in town who knows the most about delivering babies', and we shouldn't act as though it is.
actual doulas may not wear tye dye or burn incense and I'm sure many provide an excellent service to facilitate some mothers through the childbirth process. Every labor is different. They may also be qualified midwives. And many midwives will also facilitate home births where appropriate for the mother and child. Basically, the US hospital and OB doctor-centric system is ... weird.