"I don't know the answer, I find it very hard to comprehend too - The answer must lie somewhere in between.
Ooh, I wonder if that was me?
My third labour lasted three days. I was 5cm at 8am on Monday morning and had ds2 at 5pm on Wednesday.
If the question is 'why not intervene in a long labour' the answer is - as long as the mother and baby are in good health and coping with the labour, and as long as the mother is willing to continue then where is the value in intervening?
It's the interventions that need justifying, not the other way around! Letting a labour progress naturally in the event that mother and baby are both well is the default mode - it doesn't need to be justified.
"The fear of 'intervention' is being exaggerated into a meaningless mantra"
It really isn't being exaggerated - normal birth, that is spontaneous labour in which episiotomy, amniotomy, augmentation, epidural anaesthesia, CEFM, forceps, ventouse or c-section, and a managed third stage don't feature, is now vanishingly rare in the UK. How many women do you know who've given birth without any of these interventions, particularly first time mums?
I rest my case!
And yet even the RCOG estimate that 60% of women should be able to have a 'normal' birth. We're a long, long way from that.
The fact that we talk about it so much in the way that we do is a sign of how bloody dire things have got and how powerless so many of us feel to do anything about it.