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Formula is never an acceptable choice.
The hazard you exaggerate is easily dealt with by putting an eye dropper full of nascent Iodine in a bottle of water.
Every form of mammal milk is many orders of magnitude safer than formula of any kind.
Formula should be forbidden by law everywhere.
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Formula is often milk based. If a mother is HIV positive or has AIDS or Hepatitis C or is on certain medications or undergoing chemotherapy it is dangerous even deadly for her to breastfeed her infant. So yes formula is a valid even necessary option for her. T
The hazard I mention is not at all exaggerated. Which was concerning unsafe water being used to mix powdered formula not about breastfeeding.
Cite your proof.
If you make categorical statements like that you had better have a scientific citation, or you are a blithering idiot.