Why is our society so bound by boundaries?

I think your question is a vary valid one, and I am sorry that you received such an ortment of such answers, as you did. Perhaps, the reason they answered in such away was because you touched a nerve and they are at a loss to answer. When people feel something deeply they react in such a way. As for a more potable answer to your question, I don't have an easy answer. In such cases, I fall back upon what my grandmother thought me when I was a lad, and that is that we can't answer for others only our selves. So, all we can do is to make sure that we are not guilty of those things and keep pointing those things out and maybe some day more will question such things then close their eyes, (as she put it, "Pull their skirt up over their heads and run around like chickens with their heads cut of." lol). But, if that time does come, more people questioning such things, then those things will stop. And, that's the best we can hope for. It's been going on 63 years for me now and I still haven't given up hope. Of course I keep going and learning the whys of such things because in doing so you can learn more and better ways of enlightening others. So, hang in their my friend and perhaps, in your lifetime you'll see some things change. It's worth the effort.