"" it's pretty well established that smoking in pregnancy is very detrimental to the fetus.""
So are lots of things that on other threads posters come across as proud of doing them.
Such as eating foods with uncooked eggs is, Pate, Rare Steak etc, all do cause an amount of babies to die in utreo, every year, through poisoning.
There's many that seem proud that they climb ladders etc at full term, again a fall can mean a death.
My DD hasn't been able to fully stop,because of her anxiety. Going onto anti-anxiety drugs may do far more damage. Her pregnancy was accidental and it seems ridiculous to end the life of a potential baby, because you do something that may damage it's health.
I was a CP SW I saw heroin and crack addicts amazingly give birth to physically healthy babies.
Like it or not BF is best,but this forum, as is right, supports what is best for Mum.
I would think less of someone who didn't give a shit about their newborn, but people aren't that simple.
Just like staying in an abusive relationship, when pregnant/with children, is because of complex reasons.