aloha, as I made some of those comments, I will explain.
I was trying to post my thoughts on why I personally find the idea of breastfeeding a four year old makes me uncomfortable. I was not passing comment on other people, just saying why I feel the way I do, given that other people had commented and were shot down. Our personal feelings about things are surely our own, and if there is a debate is it not useful to say why we might feel the way we do (about the topic in question, anyway). I'm not implying that anyone else feels, or should feel the same way I do.
So of course there is no law, nor should there be, but I personally feel that there is a difference between a baby (generally I'd be thinking of a pre-talking child - maybe 18mths or so?) and a four year old in many many ways.
Personally I do think there is a difference between a cuddle and breastfeeding - but then maybe it's because personally I enjoy one and wasn't very keen on the other, and the reason was I didn't enjoy bf was because after a while I found I disliked having the baby attached to me so intimately.
I don't particularly see it's my business what other people chose to do (at least in regard of breastfeeding), but the original post asked "what do you think about this", and what I posted is what I think.