Your arguments are explanations of why not allowing me to buy a used ebook benefits you. You acknowledge that there might be some small benefit to me if I could buy them used and then you sort of dismiss that. Of course my arguments are similarly about why buying used books benefits me and I acknowledge your benefit from preventing that but I dismiss that. We're a couple of greedy guys.
Anyway I think we can agree that we won't get anywhere discussing whether benefitting me is more important than benefitting you. Also, the relative size of those benefits really isn't germaine. So I suggest we try discussing the moral and ethical aspects of the thing. That'll be more interesting and give us a chance to leave greed out of it.
I think I should be able to sell my used ebooks because I bought them and they're mine and the situation is essentially the same, different in only small ways, to selling used paper books, which has already been decided, at least legally. I do realize that the TOS usually say something about me buying a license to read a book and not the book itself. That's a religious distinction. You sell books. I buy books. The format doesn't affect that.
Yes it's true that I could cheat and keep a copy. But I'm a pretty honest guy and I think most people are pretty honest most of the time. And we can prove that by the fact that authors sell any books at all in these days when they're so easily found on the internet and so easily shared.
But even if people would cheat, so what! We don't stop people from driving because some drink.
Please give me one moral or ethical reason for not allowing me to buy or sell used ebooks in our free enterprise, capitalist society.
Barry