I'm inclined to believe RidingMyBike's story.
Firstly, healthcare is now supposed to be much more open about receiving feedback from patient experiences and it just makes sense to actually believe what the patient's story is. They know their experience best, they lived it and have the clearest understanding of what the factors were that led up to those problems.
If we are hoping to improve patient safety in hospitals it just makes no sense to ignore the factors that patients are saying that led up to the problems that they experienced. If someone says that they felt the baby needed formula supplementation but there was reluctance by staff to give it, why would we not pay attention to that?
Secondly with regard to linking those concerns into policy. Well, many BF promotion campaigns, articles and policy statements DO declare that "virtually all mothers can make enough milk", so, there DOES seem to be a clear link between such claims and the problem that the poster reported which was that she wasn't, and that people were ignoring this as a possibility. Were they ignoring it as a possibility because they had been repeatedly given literature claiming not enough milk could not happen?
Finally one of the baby friendly steps is to avoid all supplementation unless medically indicated. This is a part of the policy. The poster's story seems to link in to that specific part of policy guidance. She was not told to give baby supplement until baby was medically unwell.
See a link there? or no?
Correct, there is no evidence (yet) in terms of robust data linking readmissions to baby friendly status. But there is a thing called the precautionary principle - where if the health of babies is a concern, and a bit of policy says to avoid giving formula until the baby needs it medically, and then we see babies medically unwell - might there not be a link there?
There is data linking less supplementation with higher rates of readmission for jaundice, BTW. Controlling use of supplementation is a key component of baby friendly policy (step 6).