I can fully appreciate that there are potential public health issues posed by not bf, but realistically how common are these and to what extent? Considering the very high levels of obesity in the children and adults of our society today, I feel that the potential, none the less significant, public health issues raised by not bf are really just the tip of the iceberg iykwim?
They are huge and they aren't potential public health issues but very real ones imo, there is a wealth of evidence acknowledged by virtually every health organisation in the world, including WHO, NHS, UNICEF as outlined earlier that support the fact that breastfeeding levels have a significant impact on health. Yes, there are many other issues however I don't think that we can afford to underestimate the impact that this one has on health across the board.
Not all of the following is aimed at your post, more at obesity/formula in general.
There is considerable evidence linking obesity to infant feeding imo, however there are still gaps in this research, problems with control factors and isolating formula as a risk factor. I don't think anyone would or could argue that being formula fed and being overweight is a foregone conclusion.
I actually have a good metabolism despite formula
(although personal analogies when talking about risk and links are obviously as helpful and as meaningful as me saying 'smoking is not bad for you, my granda was fit as a fiddle, lived until 102 and smoked like a chimney since he was 9 etc.)
Of course it would be ridiculous not to acknowledge and work to reduce other risk factors which the NHS and UK are attempting to do. However since there appears to be a link between obesity and formula overall then this is something which needs to be acknowledged and researched further, NOT just to make a stronger argument for breastfeeding but also to see if the formula available can be improved to reduce this factor. It is important that the infant food available is raising it's standard all the time to match the research available.
For example :due to research regarding obesity and level of milk protein, the formula companies are taking note and further research has been recommended to assess whether infant formulas and follow up formulas should be developed differently, so while we shouldn't jump the gun and blame childhood (or adult) obesity on formula per se, we should definitely as a society be aware that it may be a risk factor.
Targeting health from the beginning is essential to improving health in the population imo.