While I disagree with some of the things the OP has said I agree with some of the points about preparing people for problems. I do remember hating the mums on the BF video I watched when ds1 was tiny - they were so smug - and I've always loathed euphemisms about 'early difficulties' and so on, when what I had was agonising pain.
It's very difficult to strike a balance between making sure people seek help if there's pain, and making them not see themselves as the one odd unusual case BF isn't working for if there is pain. Normalizing the experience of needing expert help would be good, IMO - by which I don't mean saying that's the usual experience, but it's within the normal range.
BUT - it's incredibly hard to get people to really listen before they've given birth, when to be brutally honest an awful lot of (especially first-time) pregnant women are most taken up with thinking about labour, names, prams and nurseries. Even if we are already expecting that there might be BF problems, you hear far more from other sources about these causing outright failure than you do about them being fixed. Also, I don't think we expect, till we know more about BF, to have to do our own research and our own digging and pushing and struggling to get expert advice on what is basically a baby-related health problem. That's arguably the most important message to get across: "You won't be able to trust the mainstream health professionals you encounter to solve BF problems even if these are very common problems and have solutions. For the best chance of success, bypass and ignore them and find a BF counsellor, read your own books, etc." But even if you say that, you sound like a mad BF obsessive. After all, it seems so odd for that to be the case.
Re leaflets and so on - it's all very well saying everyone's persuaded of the benefits of BF, but doesn't some of that come from the leaflets that some people want to see replaced with ones detailing the problems? I'd agree that it would be good to see more detail out there, but there's only so much money, and it's a hard balance to strike.
One thing that it's easy to think as you have your first babies is that things are changing significantly and fast re attitudes to BF and so on, when really they aren't, particularly. What's happening rather is that when we have our first babies we quickly learn a lot about BF, we're suddenly on the alert for anything baby-related in the news, including BF, and we have the impression of a world changing with respect to BF when most of what we're noticing has always been there but we haven't seen it. Similarly I think it's easy, once you've moved past the stage of initially learning and deciding about BF, to think well that's that agreed then, we all know BF's best, and feel that really there's not as much need for that sort of information. But I think sometimes we're projecting our own state of knowledge, and rate of change, onto society in general, if that makes sense. I read a while ago that at no point this century have doctors ever told mums formula is better - does anyone know if that's right? I can't remember where that's from. And I know from reading my own mum's Dr Spock book from the 1960s (and she was no hippy parent, far from it) that the advice at least in there re BF was quite sensible, including feeding on demand. I think things change a lot more slowly than it can seem to us when we're in the middle of changing a lot ourselves, and also we shouldn't always necessarily trust what even our parents say about their own generation, as there can be a bit of rewriting of history there too, which can make it seem as if now is very different when perhaps it really isn't that much.
Anyway - I do agree with some of the OP, as I say, re normalizing some of the problems of early BF - but I think it's a very very difficult balance to strike with limited resources, and nothing like as easy as it seems to get that message across. Getting some of the basic info across over and over again might seem unnecessary to most people here with an internetty bent, but we're a drop in the ocean of people out there starting out as parents.