To be fair, when I had the 'writing the birth plan' session with my midwife, he was very clear about the fact that it wasn't a statement of what was going to happen, but rather an opportunity to discuss preferences and educate women on the possible interventions they may require ahead of time. It's a lot less terrifying if you require forceps or ventouse to understand what those things are ahead of time and understand that they might happen, than to suddenly have them offered to you without knowing what they are. Ditto in terms of there might not be the time to thoroughly explain the risks and benefits of those in an emergency situation without endangering the baby. The birth plan was to express preferences where possible but obviously that's as far as they go.
I agree with you altogether though. There's a massive industry set up to promote the idea that if you do everything right, you'll have a specific type of birth. It appeals to women because the reality, the fact that birth is actually a pretty brutal, dangerous and unpredictable process, is difficult to swallow. So they flog you massage, breathing techniques, with the suggestion that it'll equip you to have the birth you want.
A friend of mine is super into the whole natural, attachment parenting thing, and ended up with an epidural, to this day she talks about how she 'had no choice' and 'had to have it' or her body wouldn't have relaxed enough for the baby to make it out or something. It's so sad that she feels she has to justify why she had an epidural, as if it's the worst thing in the world and some kind of failure.
I had a horrific birth, a five day induction followed by 13hr of intense, 100/10 contractions due to the induction meds, totally unmedicated because they refused to give me anything as I wasn't dilated, followed by an epidural, baby in distress, ventouse, episiotomy, stitches, a permanent birth injury and long and painful recovery. I have had women tell me it would have gone differently if I'd just relaxed and trusted my body. I mean, I was pretty relaxed other than the 13hr of unmedicated contractions (which I have PTSD from :( ), I felt safe and secure in a hospital environment surrounded by trained staff and equipment and couldn't have been more chilled about birth, I was actively looking forward to it and ready to embrace it.
So much of birth is just random depending on your body and baby on the day and it's horrible that we try and tell women that if they do everything right they'll have a certain birth.
And on the same note, we need more honesty about breastfeeding, not just that it can be hard, but that it isn't always possible for every mother, and that a percentage of people don't produce enough milk for exclusive breastfeeding regardless of effort put in. That has traumatised me way more than the birth. Being an insufficient supply parent surrounded by people telling me that wasn't a thing and being gaslit into believing that my body would meet my baby's needs, when in actual fact he was starving in front of us and came very close to brain damage and requiring a full blood transfusion.
I saw someone the other day tell a group of women that birth is no different to taking a shit, it's a natural bodily process and if you're afraid of it it's just because you've been indoctrinated into that fear. Utter, utter hogwash, and an insult to the many thousands of women who die in childbirth every single year across the world.