YANBU in the slightest, OP.
Breast milk has benefits and whilst these should be made clear in appropriate situations and appropriate contexts, they should not be trumpeted to all and sundry as some kind of bizarre and pointless arse-covering measure.
It is also (IMO) vital on an ethical level that these benefits are not embellished or overstated, but simply laid bare in the most plain and explicit form (of our current understanding). The reality is that in many instances, these benefits ARE overstated, as outlined by various posters already in this thread.
There is a tendency - on here, on the wider internet and in the big old world in general - to look upon and represent nature as an effectively sentient entity with its own wisdom. This is utter stupidity. Nature does not think, sense, reason or act. It evolves continually by responding to various external factors and stressors and for the most part, its observable "objective" (inasmuch as such an entity can possibly have one) is largely restricted to self-propagation.
This same strange characterisation of bodies as having an intrinsic "wisdom" is pervasive in discussions about natural childbirth, about which rose-tinters the world over also refuse to accept the bleedin' obvious - it's a crap system, that has evolved pretty incompetently by our own measures, that carries with it (and thus by their logic is "intended" to carry) a contextually enormous risk of death to both mother and child.
There is a reasonable argument for the idea that in their own way, bodies (and so by extension nature) do have, in one sense, an inherent wisdom/rhythm - but it is not moral. It does not care about your suffering, or your pain, or your breasts, or the state of your vagina, or indeed - within certain numerical limits - whether you or your baby live or die. The percentage of woman-and-baby "duos" (iyswim) that cannot breastfeed is really not insignificant.
The thing is, it strikes me as mighty convenient that virtually all of the passive (and sometimes openly) aggressive pontificating that seeks to fetishise and valorise the handiwork of nature and the natural, and elevate it as eternally superior to the machinations of man-made medicine, is restricted entirely to pregnancy, birth, and the aspects of early child-rearing that most directly rely upon the female body. Other developments with possible minor downsides that otherwise enhance options, ameliorate suffering, reduce pain and circumnavigate nature are seized on with immense gratitude.