That's not what people mean by medicalisation though. They aren't saying that they don't want response to an emergency if one happens. It's more of a reaction to a lot of the monitoring and procedures that happen at a lot of hospitals, particularly in the US. Some of those procedures are designed to alert you to an emergency that wouldn't otherwise be apparent, for example monitoring the baby's heart rate.
IMO it is beneficial for there to be a balance here. I've had babies in the UK and Germany. The UK is much more hands off. I only ever had 20 mins on the monitor when I came into hospital and then intermittent monitoring with a Doppler. That was sufficient and seemed to do the job perfectly well. Then they want to do vaginal examinations, which don't really have any purpose except for measuring the progress of labour which could arguably be done in other ways.
I didn't really mind these interventions and was quite happy to have them as I didn't find them too intrusive, but in Germany I was given an IV line into my hand when I arrived at hospital, despite the fact they never even used it. I had a scan, which I actually wanted on that occasion because DS3 had been playing games and turning breech and I really didn't want to give birth to a breech baby so I would have had an emergency caesarean. They insisted on an hour of monitoring on a machine and I had to have mobile monitors strapped to me even in the pool which made me cross. And then before I was allowed gas and air they insisted on putting a stupid clippy thing on my finger and they wouldn't let me have it in the pool.
The thing is that we are mammals, we know that birth is dangerous, we're evolved for it and so anything that is experienced by the body as a threat is likely to shut the birth process down or at the very least stall it. You try giving a vaginal exam or strapping a monitor to any other labouring mammal and see what happens.
I personally think any intervention should be very low threshold, as low as possible and linked to the overall risk level. We think these interventions are harmless but they are really not. Even the process of moving from home to hospital is disturbing. It's all tricky. Covid policies didn't help. I remember just overwhelmingly wanting to be in a private room/space where I knew it was safe and I wouldn't have to move and they wouldn't give me that one thing.
It's really hard to argue against these processes in a hospital setting and I do understand why some women would see birthing alone as a preferable option but it would be too risky for me. I don't want the monitors on me at all times but I want them there. I don't want people prodding and poking but I do want someone who has seen dozens of labours to be able to say hang on a moment, something isn't quite right (if it's not).