apushatayid,
I’m sure there is plenty of medical literature about the dangers of holding oneself back from reliving themselves, yet, noone will advocate doing so in the middle of the mall or in front of others in a restaurant.
1. Bad comparison – the activities you reference leave behind foul and potentially infected waste products. Even if modesty were completely removed from the equation, those activities would still be forbidden in public areas and food service facilities. Nursing leaves behind no waste.
2. Most public and private spaces provide ample access to facilities for taking care of those needs. Although increasing, most public and private spaces provide little to no facilities for nursing.
3. There is no comparison between the immodest exposure of your examples and the little to no exposure from nursing. Immodest dress is way worse, but due to a misogynistic and anti-child secular culture, many people are nonsensically more offended by nursing.
The discussion is not, should a woman be allowed to nurse in public areas, of course she should, the only discussion is, should government legislate that they be properly covered while doing so.
If the government is to begin legislating public modesty, dress codes would be a much higher priority than nursing mothers. Except that secular culture is insane.