In fact I think it's been repeated numerous times here and all over BH that whatever a woman's choice is, and if it results with a healthy baby and mum, that's all that really matters.
Even if you have a drug free birth, you can still be disappointed or experience PTS afterwards for various reasons..
I personally had a traumatic post-birth experience that I still get emotional about when i talk about it or even think about it, and this is after 5 years since giving birth to my first son and had nothing to do with the birth itself.
Things don't always go to plan.. That's life. But it doesn't hurt to prepare yourself and feel empowered and have a positive attitude going into such a big unknown as childbirth (or parenting for that matter).
And to be called naive or crazy for considering it is quite offensive and definitely not helpful.
I second vicpark's suggestion about having a plan for after baby arrives. This is definitely an area that a lot of people probably don't even think about the first time around, and from my experience, it can be really harmful to mum & baby if it's not managed right.