I love the storm analogy. It drives me crazy that we're expected to be dressed for the hurricane, no matter how nice a day it is. But, it also does no good to pretend the hurricanes never happen.
Trusting birth...I do, but it is a weird way to phrase it. I trust birth to happen, usually, the way it's supposed to. That doesn't mean that I think a good attitude and doing all the right things guarantees a good birth or a healthy baby or whatever. I also like the "birth is as safe as life gets", but I understand why some people don't. The way it's used sometimes is intellectually dishonest. I've almost been killed crossing streets with the lights, after looking both ways - twice. I've done illegal drugs in irresponsible ways, and been completely fine. Birth is no different. It's not an illness. It's not an emergency. But, it's not completely safe. "Completely safe" is a null concept - it doesn't apply to life, and it doesn't apply to the beginning of life.
I never had any doubt that I'd have a vaginal birth the first time. I remember thinking that if the pain were much worse than I thought it would be (it wasn't - it hurt, but not like I was told it would), I might get pain meds. But, I wasn't even remotely planning to, because I hate pain meds. I trusted myself and my body and I laboured at home for almost a day. And...I didn't realize my little gymnast had turned breech during labour (as an aside, I've been assured by experts that he didn't, because that's not possible in a first-time mom). I ended up having a c-section. While I really thought I'd VBAC next time, my trust in birth and my body was shaken. I was too easily pressured into repeating the section, because of that lack of trust. When my first was 14.5 years old, I finally really believed I could give birth...and I ended up with my 4th c-section and stillborn son.
I don't "trust birth" for me, anymore. My last baby arrived by c-section on Friday, and I had my tubes tied. But...I still trust birth as a physiological process, in general. I trust my heart to beat and my lungs to work, too - but that doesn't mean that hearts and lungs never fail, yk? Because I know people with heart disease, doesn't mean I have to live as though I have it. Because I had multiple c-sections and a stillborn baby, doesn't mean every woman has to be treated as though those things are imminent.
So, basically - I think the medical establishment is completely off track...but I also think there are segments of the natural birth community who go overboard in the other direction.