I hear you banana no-one has to answer if they feel this is about defending or justifying their choice. I don't think the op came across that way at all.
Some have very usefully and helpfully simply answered the question. They haven't been judged or attacked for it (barring the one outrageous pp which stood alone).
That pp should be deleted.
There's a lot around feelings of discomfort psychologically, to feelings of sick, or sexualisation of breasts. These have been really useful insights to understanding the rationale behind this decision. No-one has said that the formula is best for instance, some that it presents to them as being less challenging than bf, and not painful (although I'd argue that engorgement through not bf at all is!).
From my perspective it would need to be quite a strong argument against bf because of the long lasting conferred immunity on top of other benefits, especially for preemies. That's not a judgement on others, but my own take on it.
No-one could blame anyone suffering, in pain, exhausted, and struggling with inadequate support for switching. All of that induces other negative risk factors .
Is it wrong for those on the front line to challenge some of the beliefs/myths around bf?
It is wrong of them/other HCP and DMs to promote bf?
That seems to be how some pp have responded, that it shouldn't be promoted or challenged.
No way any DM should be made to feel somehow less than, or guilty though! Many other pp have been angry about having their bf/FF beliefs challenged, not that they felt guilted just that that's their choice and to shut up about it.