I don't deny that the cascade of intervention is real and does cause complications, but that is a separate issue.
In birth, things do and can go wrong. There have been a number of births that were unassisted (a different discussion to midwife attended home birth, but no intervention is the point) and things went wrong to the point of death.
I had a midwife present who didn't do a single intervention, other than occasionally listening to the baby with a doppler in whatever position I happened to be in at the time. One of my births is an example of what can go wrong. Reasons:
High parity - this can increase the risk of the type of complication I had.
Large baby - can also increase the risk.
Cord issues - probably the ultimate cause.
Unassisted, midwife at home or hospital, I would have had the same problem. I don't regret that it was a home birth. All the while though, I can acknowledge I would never have got as close to death as I did had I been in hospital. If I'd had a c-section, in hindsight, it would have been very justifiable, even for me who is against any unnecessary intervention in birth.
Yes, interventions can cause problems and complications, but let's not stick our heads in the sand and pretend it's the only cause of problems. Sometimes things happen all on their own during birth.
I am still very pro home birth and comfortable with the idea, I would have no problems with my daughters choosing to birth at home, however I am realistic and birth carries risk. Otherwise why did you have a midwife present in the first place? Because we know that sometimes, things don't go to plan.