Oh, they can be REALLY good at expressing negativity toward any form of pain relief, and often it is their tone of voice, their facial expressions, and what they don't say as opposed to what the do say.
At my antenatal classes - the normal NHS ones, the midwives were so negative toward pain relief, and then to top it off, they said that when you go through everything without any drugs, why would you want to use drugs for the 3rd stage - ie the placenta stage - in a tone of voice that indicated you were a poor excuse for a mother if you chose to use any of the medication at all.
I went to a hospital information session with an anaethetist, who explained the ins and outs of all of the options of pain relief, factually and without the negative overtone. It was really reassuring. I went away thinking "Well, I will go without anything for as long as possible, and then ask for gas if I need it toward the end. BUT, if I need anything else, then I know what's involved, and I know the risks." I was a darn site better informed than any of the other women in my ante natal class.
As it turned out, I did need an epidural - my contractions were long, as in each contraction lasting roughly 6-8 minutes, some over 10 minutes. My darling DS decided to join in the fun by kicking me while the contractions were happening and making them go longer. Gas wasn't helping at all (you can't take gas for such long contractions!!!). Apparently my midwife was very worried about me, but fortunately for me she didn't show any of this to me - don't think I could have dealt with it at the time. (Poor DH started panicking a bit though!)
After going for as long as I could, I asked for an epidural and even then it took me 3 hours before the anaethetist got to me - I had the misfortune of asking after 'business hours' while there were 3 caesareans going on and only 1 anaethetist. After 3 hours I was screaming at my DH to get the anaethetist and drag her in by her hair if he had to, just as she walked in.
If I had met any of those numpties that were on their high horse about natural child birth and the evils of pain relief while I was in hospital after the birth, I think I would gone a bit mental at them.