Maybe it was more for the privacy of BF mothers. I know my mum always preferred to feed alone in a room away from everyone else. Not because she cared what everyone else thought (or saw) but because to her it was something very special and intimate that she wanted to share just with her child away from all the hustle and bustle. She also said we were very easily distracted and fed a lot better when we were focused on the boob and not everything else around us. And she wanted to only focus on us and not be disturbed or having to make conversation when all she wanted to do is spend time with us and watch us feed. It was her 'special time' when she could sit back and relax. I think there's nothing wrong with that!