@thereareflowersinmygarden
"It's a wonder the human or rather British race, survived.
Most women can breastfeed and so can most babies.
Otherwise, why do other countries have much higher rates than us?
Something is either wrong in this country or the British are different somehow."
OK, so if you look at countries where BF (and EBF) rates are very high, typically they are countries with absolutely colossal neonatal mortality rates and also maternal mortality rates. like much of sub-saharan Africa - very different to the UK in the distribution of risk factors for BF problems, but also many difficulties with BF would be "hidden" by the high mortality rates caused by other things. So substantial bf problems are not going to be visible.
Also typically even in those cultures even if you see 99% of women bf'ing, they are not EBFing. supplementation is common. it's just that unsafe fluids are used - but in the UK formula is safe, so why not support safe supplementation when it's needed.
Even in norway, 74% BF at 6 months or something, but the EBF rate is barely higher than the UK's (7% vs 1%). EBF rates in all high income countries are very very low.
There are a LOT of risk factors that are affected by demography that can factor into physiological problems with milk production. eg, maternal age can affect it (and in rich countries women tend to have babies later). Delayed onset of milk is hugely affected by parity - much more common for first birth, less common for subsequent. Therefore in countries where most women have many babies (eg 4, 5, 6 babies on average) this problem will factor out across the population to be a much smaller % of women affected. Whereas in the UK birth rate is very low, hence a larger proportion of all births are affected by a delay in the milk coming in. If the maternity culture does not support supplementation, then a lot of these mums will just stop BF altogether because they think they have "broken the rules" about how to BF (ie, they are meant to be exclusively BF not BFing with supplementation when needed).
Many many other factors. it is scientifically rubbish to say oh, 99% of women can BF and if the UK has low rates it cannot possibly reflect biological factors and must all be psychosocial. (Although these explanations are very fashionable).
PS: throughout prehistory, child mortality rates were around 50%. Imagine giving birth to 10 children, (no contraception) and 5 of them dying before they were 5?
PPS: change your phrasing to:
t's a wonder that humans survived.
If childrens' immune systems were so awful as the need for vaccines against measles, polio etc suggests, we would have just died out!