Without outing myself, I have professional experience (and NCT-related experience) supporting mothers in very deprived circumstances, and actually, some of them do breastfeed. Only a very few do it more than enough to get on the radar though - an HV I worked with studied the bf habits of the poorest ward in the city and was amazed to find something like a third of the mothers had started to bf. But of course they had stopped by the time their HV got anywhere near them.
Another midwife I knew well worked in a similar area and got the initiation rate up to about 60 per cent (from about 10 per cent) in about five years. She put mothers in touch with other mothers, gave out huge praise and was loved enough by her clientele for them to give it a go....and some of them found they loved it.
Some mothers - the ones who don't use the web very much, the ones who don't read much, not even magazines - truly do not even think they can breastfeed. I mean, they know enough to know that breasts make milk and that babies can drink from them, but they just don't think they can. If they do have a go, it feels crazy to them, and of course they are highly vulnerable to accusations of being disgusting, of not having enough, of needing to top up etc etc etc.
So nurturing the doubting ones, the under-confident ones, the threatened ones who start but who then crumble on day 1 or 2, seems to me to be important. Why should anyone need to have buckets of confidence just to breastfeed?