If you noticed, it was someone who holds a non-smoker's view that brought other dangers into the thread. I personally never stated that it was ok - I just implied that it was rather convenient for some to focus lots of vitriol on pregnant mothers who smoke whilst ignoring the (more important and sometimes lots more dangerous) parts we ALL play in harming our (and other) children's health.
By the way, if someone smoked through pregnancy and their children turned out with no respiratory issues or smoking-related illnesses, it is their right to state as such. My mother smoked whilst she was pregnant with me and, to my knowledge, it has never adversely affected my health. It's just a fact. And people are, on the one hand, told to listen to and take the advice given to them by health professionals, but then disparaged when they do. If a qualified midwife/doctor tells a mother that she may continue smoking if doing otherwise would be more detrimental to her and her baby, then I simply do not see how a non-health professional can profess with all certainty to have the medical knowledge and experience to state otherwise, especially without knowing all the different factors that led to the midwife/doctor reaching that decision.
At the end of the day, say what you wish, but it IS the mother's choice. Until that choice becomes illegal, then you may judge as much as you like but it makes not one iota of difference other than you perhaps feeling slightly better about yourself whilst most probably sitting behind the wheel of a car much more poisonous overall than a cigarette, or crossing a road with your children before the pedestrian light allows for it, or feeding your children foodstuff that contains aspartame, etc etc. Smoking or not, all those actions carry extreme risk but you as a parent make the decision to take that risk and hope for the best. What makes you any better than others who do the same?