As a parent who has been actively involved with the rearing of our two children, I hope I “qualify” as understanding enough to respond.
This has been the most telling response to date:
Public breastfeeding has occurred for decades. But the key word here is discretion. We seem to continue to evolve into a society where we measure our activities by our perceived rights and equalities, and lose sight of the fact that we are still members of a larger society. Perhaps we have lost a bit of that Chip N’ Dale quality (“after you” “no, no, after you”) when we always cared about how our activities impacted the people around us.
So far, no one has articulated a compelling principle for open public breastfeeding that would exclude activities to which we would object (masturbation, personal grooming (i.e., clipping toe nails), chewing with our mouths open, etc.). To me, the strongest argument in favor is the health of the child. Unfortunately, that is not really a working priority for society today.