On the contrary, very few miscarriages can be attributed to any action of the mother. Most miscarriages are caused by a lethal genetic defect; others by immunological, hormonal or clotting problems, unknown to the mother, not in her control, although perhaps treatable after careful diagnosis.
Grieving mothers already blame themselves for failing their babies, without cause.
Please don’t add to their grief by opining that they may have made poor choices.
You are wildly wrong, my wife is an addiction nurse, the number of miscarriages through addiction is horrifying.