"Many, many, many c-sections and assisted deliveries are avoidable. If it's important to you to give yourself a chance of a straightforward delivery then you might want to think about whether you want to have your baby in a unit which has a very low rate of normal births. You have already chosen a birth centre over the labour ward so you're already giving yourself a better chance of an uncomplicated labour"
Mini fingers, comments like this make me so ANGRY! You have no idea whether the cord is around your baby's neck, or if it is in breech position whether it will turn...there is some sort of implication in a comment like this that somehow there is something "wrong" with a c-section or assisted delivery or that simply by 'choosing' a normal, event-free delivery it will always happen that way. The implication is that if the woman was just a bit of a better mother patient, independent, powerful woman that she wouldn't actually require any intervention at all.
I have a friend who required an emergency C-section or she and her baby would have died. She still (ridiculously) feels guilty about the fact that her labour was complicated and she required intervention and her child is now in secondary school. I also, sadly, have two friends whose DC were stillborn which obviously had nothing whatsoever to do with the environment in which they gave birth.
Similarly your comments that 'most can breast feed with the right help' seem to suggest that if you don't breast feed you have 'given up' either too soon or haven't really tried properly, and are therefore failing your child. And in no way does my observation that both Bottle/breast fed babies grow equate to a suggestion that breast feeding doesn't matter at all. If OP wants to choose either one, she should be happy with her choice.( and before you assume I am somehow a bit sensitive about this because I didn't breast feed and therefore am trying to make myself feel better about bottle feeding, I breastfed both my DC until around 12 months with no issues whatsoever...I feel very fortunate I was able to as other friends had such hideous mastitis they were crying in pain and the stress was simply upsetting their babies, while others did not have the milk to satisfy their babies demands, despite weeks of so-called expert coaching and help from breast feeding consultants to whom they paid rather a lot of money!)
You also suggest to look into the fact that 1:8 find pain relief ineffective. If we are looking at statistics, perhaps the mortality rate of those who give birth at home vs in a labour centre or hospital is worth looking at. Sadly, the statistics seem to contradict your assertion that a birth without medical support or done in a non-medical environment is going to be uncomplicated. How is avoiding the possibility of medical help should it be needed giving yourself a better chance of uncomplicated labour? No mother controls the labour process...she deals with it and responds to it.
OP - do what is right for you and your situation. There will always those who disagree with you and those who think you've got it spot on, so don't worry what other people think, and don't let other's negative opinions on any choices you make or don't make bother you.
Try things the way you would ideally like them, but as many others have sensibly said, don't beat yourself up about it if labour or after labour isn't going the way you expected, hoped or planned. Take each day and new situation at a time, and I hope you have lots of love and non-judgemental support from your family and friends. Enjoy motherhood as there is nothing like it and once DS arrives, your life will never be the same again!