Nieicie, you know, I suspect if we sat down and had a coffee together that we'd agree on most things.
So if I'm constantly seeming to argue with you it's only because I think our disagreements are more interesting than our agreements. [weird back-handed compliment]
I think we have a fundamental disagreement about the place of personal experience in parenting decisions.
I feel I'm sort of being backed into a corner of criticising personal experience, which makes me uncomfortable because I think being able to listen to other people's personal experiences on MN is amazing, and I've learned a huge amount from doing just that.
But when someone is facing an important decision on a health matter, giving advice based on personal experience is limited and even potentially harmful.
You say, "there are other influences on the health and welfare of our children apart from what we fed them in the first 2 years of their lives. The diet they continue to have, the amount of exercise they get, where they live and the environmental impact of that, their socio-economic class, their level of education, etc, etc, etc. This is an extremely complex web of influences."
Yes, exactly. And so when an individual gives you their experience of a decision they made, they have no way of knowing how much other factors influenced the outcome. "I did it and my children are fine". Absolutely. But "therefore I recommend you do it too" - this kind, well-meaning advice may be doing someone else no favours at all.
It's only when you put thousands of individuals together and adjust for all the other influences, that you can see the true effect of a decision. The technical term for this is adjusting for confounding, and it's a standard procedure in research. Another standard procedure is measuring probability, to demonstrate that the effect was unlikely to have happened just by chance.
For decisions about the effects of bf where the health effects can be subtle, occur over long time periods, and are influenced by many factors, it usually requires thousands to tens-of-thousands of cases before you can be confident that the effect of all those other influences has been reasonably well cancelled out, and that any differences weren't just random chance.
With the best will in the world, no-one can make those judgements based on an experience of 2 or 3 children.
It's not about setting up arbitrary standards for new mums to meet or fail - it's about giving them the very, very best info so that they have the best shot at making a good decision - whatever that decision turns out to be.