I think it’s phrased less that it is acceptable, and more that “why are you only focusing on Amazon, when it is like this everywhere you look in logistics?”

It would be one thing to stop shopping at Amazon because of how they treat their workers if you also stopped shopping at other companies whose workers are peeing in bottles behind the scenes. Do the things you buy get shipped at some point by truck-based logistics? If so, piss bottles are already involved, it is just that we were all blessedly unaware.