> Imagine you sent me a post card (...)
I like this. Post-cards are a better analogy for plain http than the sand castle.
Of course postcards are not "secure": everybody can read them, and you can trivially impersonate somebody else sending a postcard. Any serious snail mail communication must go via safer channels. Yet, postcards are a very nice thing to have, it would be a shame if they weren't possible. My kids can easily send a postcard to their grandparents, just by themselves. My grandfathers will probably (but nor surely) receive the postcard, and they will recognize who wrote them (but they can never be sure, really), and everybody will be happy.
In the same vein, HTTPS is better than plain HTTP for serious communication, and there's nothing wrong with it. Yet, the existence of HTTP is another fundamental part of the internet, and I make a point of using it as much as possible.
Do you propose that anonymous postcards shouldn't exist, and that the post office should only accept letters certified by adults who had identified themselves at the local police station? I would hate that! And for the same reasons I hate a world without http.
