"making the "we can do what nature intended" proclamation slightly silly to be frank"
Yes - it is 'slightly silly'. I never said it was a 'sensible' comment.
But the sentiment is understandable when you take into account that this person has just been through a difficult first labour and is euphoric and exhausted.
And the vicious judgementalism with which it's been treated here on mn is, IMO 
"And all your posts are just thinly veiled acclaimations that you did it better, and experienced it more profoundly than anyone else"
Why such a a stupid, bitchy and personal comment?
"?Fact is, that no one else probably cares how you experienced it, or did it. Why on Earth should they? It should be a very personal thing...
If you object so people talking about their personal experiences of pregnancy and birth, why do you spend half your life on mumsnet posting and reading about it?
"well, that just proves you are precisely the type of person that, if I have to sit next to them at a dinner party. "
If I discuss my personal experiences of childbirth on a thread in which other people are also discussing their experiences of childbirth, and their feelings about it I must ergo be someone who talks about it without any encouragement at dinner parties? 
"Titty I speak very confidently about my feelings re labour because I know my own body thanks to 7 years ttc and carrying hefty twins full term(luck again)."
So having done several days of labour, is it ok for me to assume that I know just how I'd feel after going through a difficult pregnancy with twins?
"I think it's a little patronising to say posters who have a problem with the Facebook poster are being defensive about there own choices for childbirth. It's on a par with the " having ishooos" accusation that frequently gets thrown in on certain other threads,it only serves to belittle a perfectly valid opinion and it isn't pleasant"
It's not 'unpleasant', patronising or inaccurate to point out that many women are left with unresolved, and often unexamined emotions following their experiences of childbirth and breastfeeding - actually it's a glaring truth. The threads about baby feeding that crop up here regularly (I assume that's what you mean with your reference to "certain other threads") are the strongest evidence of that, but if you needed any other evidence there is plenty of academic research out there which explores this issue.
"I take exception to this idea and implication that if one hasn't experienced 2 days of drug free labour one somehow isn't entitled to comment on childbirth"
You'd be entitled to take exception to it, except I didn't say that you had no right to comment!
"They may not have been the perfect births by your standards but they were by mine as they gave me 3 healthy, beautiful children."
Nasty and unfair comment - I haven't used moral language in any of my posts to describe different types of birth. I've said over and over again that the most important thing is to get through the birth with both mother and baby in the best possible physical and mental health. For some reason you've chosen to overlook this and misinterpret my other comments to make me seem judgemental and unkind.