There are perceptional reasons why it may feel like milk worked better such as it being cooled vs using room temperature water. Or from being the second thing used. Or from various different factors
But the research above suggests it doesn’t do as much as people think it does
The infection risks are not the same. Milk has stuff in it that microbes like for growing where water doesn’t have nearly all that. Other stuff can enter inside. The eye infection pathway is concerning especially right now when bird flu seems to enter that way and is in large quatities of dairy milk. Not all pasturization methods are certain to actually remove it (i.e flash pasturization might not)
Edit: A minor point to clarify, capsaicin is in pepper spray but not tear gas. They often do get conflated but they are different
Factory farming is very much a global problem that’s not limited to the US
https://www.sentienceinstitute.org/global-animal-farming-estimates
It’s not just more people that’s caused factory farming. It’s increase per capita consumption. The rates of per capita consumption are enormously different. If everyone ate like Americans, we would need 137% of the world’s habitable land which includes forests, urban areas, arable and non-arable land, etc. Cutting down every forest wouldn’t even be enough
https://ourworldindata.org/grapher/share-of-global-habitable-land-needed-for-agriculture-if-everyone-had-the-diet-of