No, but everything you listed is purely anecdotal unless there's some kind of real evidence to support the claims. A random mother who breastfed and never used formula claiming that 'breast is best' is absolutely meaningless. How would she know breast is best, and by what criteria is she making such a claim? Hell, how does she know her kid wouldn't be better off if they had some formula mixed in? It's not censorship, it's keeping opinions as opinions and not facts. This applies to every example you listed.