Cushioncover, I'd agree with you that education can increase confidence and reduce fear and thus lead to a better experience.
However, none of the measures that you mention are a cast iron guarantee against any of the things they're meant to prevent happening. My friend did perineal massage for 2 months, episiotomy with the 1st and tore with the 2nd. I did it for 2 months and never even got to pushing stage.
I attended 2 lots of nct classes (hospital run and private). In the hospital one run by a mw from the hospital she showed us the labour rooms and reminded partners/husbands that their job as soon as getting into a room was to raise the bed so their wife/partner would not be tempted to lie on it. When I met 2 of the women from that antenatal class in hospital we had all had csecs for different reasons although I don't think major haemorrage due to placenta previa being rushed to hospital and baby out under GA is something that could have been avoided by perineal massage or remaining upright.
What if you have a pre-existing condition that means you have to be induced early and have CFM throughout active labour? I asked if I could get into good positions with a monitor on and it was all I could do to fight to be allowed to lie on my left side rather than my right? What do you do in a situation in which they're telling you do this or we won't know if the baby is in danger? In the midst of 4 contractions in 10 minutes with a max of 30secs in between is not the best time to make your case.
I did my research, bought a pink kit and worked through it and persuaded my dh to help with partner positions, practiced breathing and visualisation,read up on different pain reliefs and their effects on baby, mother and labour, exercised regularly and had a doula. And that was on top of controlling a medical condition sent haywire by pregnancy that could have had major adverse effects on my baby. I went in knowing it would hurt more than it might otherwise as I was being induced and I ended up with an emergency cs. Am I a failure because I let them induce me, let them monitor me and had an epidural when the pain got too much?
A relative who's a great grandmother told me that when she had her children, you were alone without your husband and were not allowed off a bed. She managed to have all of them without a cs. The practice of the nhs has moved on since then but so has the level of monitoring which allow them to pick up problems and the fear of litigation which cause them to do emcs faster than they used to ie when a baby is in distress.
Yes the methods you mentioned may assist somewhat in lowering the rate but what would have just as profound an effect is hospitals not insisting that women dilate 1cm per hour or else they are getting to failure to progress territory and forcing interventions for policy reasons.
But at a guess the women who've never heard of these things are not the ones haunting the childbirth thread on MN!!